EXPLAINER: How the U.S. and allies can freeze Russian gold


              British Prime Minister Boris Johnson, left, and Turkey's President Tayyip Erdogan attend a bilateral meeting during a NATO summit on Russia's invasion of Ukraine, at the alliance's headquarters in Brussels, Thursday March 24, 2022. (Henry Nicholls/Pool via AP)
            
              Canadian Prime Minister Justin Trudeau, left, talks with German Chancellor Olaf Scholz, center, and British Prime Minister Boris Johnson, right, during an extraordinary NATO summit at NATO headquarters in Brussels, Belgium, Thursday, March 24, 2022. As the war in Ukraine grinds into a second month, President Joe Biden and Western allies are gathering to chart a path to ramp up pressure on Russian President Vladimir Putin while tending to the economic and security fallout that's spreading across Europe and the world. (Michael Kappeler/DPA via AP, Pool)
            
              From left, Britain's Prime Minister Boris Johnson, French President Emmanuel Macron and U.S. President Joe Biden arrive for a G7 leaders' group photo during a NATO summit in Brussels, Thursday March 24, 2022. (Henry Nicholls/Pool via AP)
            
              British Prime Minister Boris Johnson, left, and Turkey's President Tayyip Erdogan attend a bilateral meeting during a NATO summit on Russia's invasion of Ukraine, at the alliance's headquarters in Brussels, Thursday March 24, 2022. (Henry Nicholls/Pool via AP)