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Civilians fleeing Mariupol describe street-to-street battles

People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) An elderly woman sells used items at a flea market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer bakes bread for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ludmila, left, says goodbye to her granddaughter Kristina, who with her son Yaric, leave the train station in Odesa, southern Ukraine, on Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion. (AP Photo/Petros Giannakouris) People attend a concert organized by the Lviv National Philharmonic in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Refugees with children at a railway station in Przemysl, Poland, after fleeing the war from neighbouring Ukraine on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A family walks next to anti- tank barricades in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) People roam around a used-books street market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) An elderly woman sells used items at a flea market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer bakes bread for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ludmila, left, says goodbye to her granddaughter Kristina, who with her son Yaric, leave the train station in Odesa, southern Ukraine, on Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion. (AP Photo/Petros Giannakouris) People attend a concert organized by the Lviv National Philharmonic in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Refugees with children at a railway station in Przemysl, Poland, after fleeing the war from neighbouring Ukraine on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A family walks next to anti- tank barricades in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) People roam around a used-books street market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) An elderly woman sells used items at a flea market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer bakes bread for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ludmila, left, says goodbye to her granddaughter Kristina, who with her son Yaric, leave the train station in Odesa, southern Ukraine, on Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion. (AP Photo/Petros Giannakouris) People attend a concert organized by the Lviv National Philharmonic in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Refugees with children at a railway station in Przemysl, Poland, after fleeing the war from neighbouring Ukraine on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A family walks next to anti- tank barricades in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) People roam around a used-books street market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) An elderly woman sells used items at a flea market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) An elderly woman sells used items at a flea market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer bakes bread for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A volunteer bakes bread for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ludmila, left, says goodbye to her granddaughter Kristina, who with her son Yaric, leave the train station in Odesa, southern Ukraine, on Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion. (AP Photo/Petros Giannakouris) Ludmila, left, says goodbye to her granddaughter Kristina, who with her son Yaric, leave the train station in Odesa, southern Ukraine, on Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion. (AP Photo/Petros Giannakouris) People attend a concert organized by the Lviv National Philharmonic in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) People attend a concert organized by the Lviv National Philharmonic in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Refugees with children at a railway station in Przemysl, Poland, after fleeing the war from neighbouring Ukraine on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Refugees with children at a railway station in Przemysl, Poland, after fleeing the war from neighbouring Ukraine on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A family walks next to anti- tank barricades in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) A family walks next to anti- tank barricades in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) People roam around a used-books street market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) People roam around a used-books street market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) An elderly woman sells used items at a flea market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer bakes bread for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ludmila, left, says goodbye to her granddaughter Kristina, who with her son Yaric, leave the train station in Odesa, southern Ukraine, on Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion. (AP Photo/Petros Giannakouris) People attend a concert organized by the Lviv National Philharmonic in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Refugees with children at a railway station in Przemysl, Poland, after fleeing the war from neighbouring Ukraine on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A family walks next to anti- tank barricades in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) People roam around a used-books street market in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugee children from Ukraine lie on their cots in the emergency shelter and pass the time in Bad Kreuznach, Germany, Tuesday, March 22, 2022. (Boris Roessler/dpa via AP) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Refugee children from Ukraine lie on their cots in the emergency shelter and pass the time in Bad Kreuznach, Germany, Tuesday, March 22, 2022. (Boris Roessler/dpa via AP) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugee children from Ukraine lie on their cots in the emergency shelter and pass the time in Bad Kreuznach, Germany, Tuesday, March 22, 2022. (Boris Roessler/dpa via AP) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugee children from Ukraine lie on their cots in the emergency shelter and pass the time in Bad Kreuznach, Germany, Tuesday, March 22, 2022. (Boris Roessler/dpa via AP) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) People stand around a giant peace sign with the message 'Stop Putin's Oil', put up by demonstrators ahead of an EU and NATO summit in Brussels, Tuesday, March 22, 2022. Protestors on Tuesday called on EU leaders to impose a full ban on Russian fuels and to hold one minute of silence to honor the victims of war. (AP Photo/Geert Vanden Wijngaert) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugee children from Ukraine lie on their cots in the emergency shelter and pass the time in Bad Kreuznach, Germany, Tuesday, March 22, 2022. (Boris Roessler/dpa via AP) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees from Lviv, Ukraine, sit in a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing punch ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A boxing ball with a drawing of Russian President Vladimir Putin's face hangs inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Sandbags protect a building entrance in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian President Volodymyr Zelenskyy appears on the television inside a bar in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. Ukrainian forces fought off continuing Russian efforts to occupy Mariupol and claimed to have retaken a strategic suburb of Kyiv on Tuesday, mounting a defense so dogged that it is stoking fears Russia's Vladimir Putin will escalate the war to new heights. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) An elderly woman walks pass concrete blocks topped with sandbags at a street in Odesa, southern Ukraine, on Tuesday, March 22, 2022.(AP Photo/Petros Giannakouris) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Firefighters extinguish a fire in a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Firefighters extinguish a fire in a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire in a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Firefighters extinguish a fire in a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian serviceman has a rest on his position in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Refugees with children wait for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) A woman waits for a transport after fleeing the war from neighbouring Ukraine at a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian President Volodymyr Zelenskyy addresses the Italian parliament via video link, in Rome, Tuesday, March 22, 2022. (Roberto Monaldo/LaPresse via AP) A volunteer cooks food for Ukrainian servicemen in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian serviceman checks documents of a driver in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian servicemen have a rest in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) A car destroyed by shelling is seen in a street in Kharkiv, Ukraine, Tuesday, March 22, 2022. (AP Photo/Andrew Marienko) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A couple kisses in downtown Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Displaced Ukrainians on a Poland-bound train bid farewell in Lviv, western Ukraine, Tuesday, March 22, 2022. The U.N. refugee agency says more than 3.5 million people have fled Ukraine since Russia's invasion, passing another milestone in an exodus that has led to Europe's worst refugee crisis since World War II. (AP Photo/Bernat Armangue) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) A ribbon in the colours of the Ukrainian flag fixes hair of a girl as Ukrainian refugees with children wait to board a bus at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian refugees with children board transport at a square next to a railway station in Przemysl, Poland, on Tuesday, March 22, 2022. (AP Photo/Sergei Grits) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) A refugee from Lviv, Ukraine, holds a baby upon his arrival at a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) Firefighters try to extinguish a fire amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire at a shopping center following a bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) A refugee from Lviv, Ukraine, holds a baby upon his arrival at a Red Cross headquarters in Rome, Tuesday, March 22, 2022. A convoy of Red Cross vehicles carrying 80 people, mostly elderly and sick arrived Tuesday in Rome. (AP Photo/Alessandra Tarantino) Firefighters try to extinguish a fire amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire at a shopping center following a bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters try to extinguish a fire amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire at a shopping center following a bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters try to extinguish a fire amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire at a shopping center following a bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters try to extinguish a fire amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire at a shopping center following a bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters try to extinguish a fire amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire at a shopping center following a bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters try to extinguish a fire amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Ukrainian soldiers and firefighters search for people under debris inside a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Firefighters extinguish a fire at a shopping center following a bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) A woman walks on a deserted street in Kyiv, Ukraine, Monday, March 21, 2022. As Russia intensified its effort to pound Mariupol into submission, its ground offensive in other parts of Ukraine has become bogged down. Western officials and analysts say the conflict is turning into a grinding war of attrition, with Russia bombarding cities. (AP Photo/Vadim Ghirda) Serhii Volosovets, a commander in the Ukrainian Territorial Defense Forces, fires a pistol during a training camp for volunteers in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Ukrainian firefighters and servicemen search for people under debris inside a shopping center after bombing in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Daryna Kovalenko, 19 , holds her dog Tim, while arriving at Kyiv's train station after leaving her home in Chernihiv, Ukraine, through a humanitarian corridor, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Refugee children from the Ukraine wait with their mothers for the start of their classes in Berlin, Germany, Monday, March 21, 2022. Forty Ukrainian refugee children started their first day of elementary school in Berlin on Monday only weeks after they fled the war back home. The two private refugee classes were put together by two Berlin volunteers who managed to raise funds, get free class rooms. (AP Photo/Markus Schreiber) In this image from video provided by the Ukrainian Presidential Press Office, Ukrainian President Volodymyr Zelenskyy speaks from Kyiv, Ukraine, on Monday, March 21, 2022. (Ukrainian Presidential Press Office via AP) Firefighters extinguish a fire near a shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) Slava Chikov, left, covers the shattered window of his living room with a plastic sheet in a building damaged by a bombing the previous day in Kyiv, Ukraine, Monday, March 21, 2022. As Russia intensified its effort to pound Mariupol into submission, its ground offensive in other parts of Ukraine has become bogged down. Western officials and analysts say the conflict is turning into a grinding war of attrition, with Russia bombarding cities.(AP Photo/Vadim Ghirda) A man reacts standing near his house ruined after Russian shelling in Kyiv, Ukraine, Monday, March 21, 2022. At least eight people were killed in the attack. (AP Photo/ (AP Photo/Efrem Lukatsky) Worker Ruslan Trishchuk, 40, smokes a cigarette while taking a break outside the crematorium of Baikave cemetery in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Rodrigo Abd) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) A priest prays by the ruins of a destroyed shopping center after shelling, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Efrem Lukatsky) Volunteers cook in the courtyard of a theatre in the city of Drohobych, western Ukraine, Monday, March 21, 2022. The theatre has become a meeting point, where artists, including those displaced from other parts of Ukraine, have turned their talents to making food for soldiers and others as part of a massive volunteer war effort across the country. (AP Photo/Bernat Armangue) Volunteers prepare varenyky, stuffed dumplings, inside a theatre in the city of Drohobych, western Ukraine, Monday, March 21, 2022. The theatre has become a meeting point, where artists, including those displaced from other parts of Ukraine, have turned their talents to making food for soldiers and others as part of a massive volunteer war effort across the country. (AP Photo/Bernat Armangue) An advertising billboard in front of a barricade in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Rodrigo Abd) People carry wooden boards to cover the windows of a building damaged by a bombing the previous day in Kyiv, Ukraine, Monday, March 21, 2022. As Russia intensified its effort to pound Mariupol into submission, its ground offensive in other parts of Ukraine has become bogged down. Western officials and analysts say the conflict is turning into a grinding war of attrition, with Russia bombarding cities.(AP Photo/Vadim Ghirda) A firefighter looks at the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/ (AP Photo/Rodrigo Abd) Civilian volunteers attend a training camp of the Ukrainian Territorial Defense Forces in Brovary, northeast of Kyiv, Ukraine, Monday, March 21, 2022. (AP Photo/Felipe Dana) A woman measures a window before covering it with plastic sheets in a building damaged by a bombing the previous day in Kyiv, Ukraine, Monday, March 21, 2022. As Russia intensified its effort to pound Mariupol into submission, its ground offensive in other parts of Ukraine has become bogged down. Western officials and analysts say the conflict is turning into a grinding war of attrition, with Russia bombarding cities.(AP Photo/Vadim Ghirda)