Residents can return after air deemed safe from derailment


              This photo taken with a drone shows portions of a Norfolk Southern freight train that derailed Friday night in East Palestine, Ohio are still on fire at mid-day Saturday, Feb. 4, 2023. (AP Photo/Gene J. Puskar)
            
              Ohio Governor Mike DeWine, right, prepares to meet with reporters after touring the Norfolk Southern train derailment site in East Palestine, Ohio, Monday, Feb. 6, 2023. (AP Photo/Gene J. Puskar)
            
              A black plume rises over East Palestine, Ohio, as a result of a controlled detonation of a portion of the derailed Norfolk Southern trains Monday, Feb. 6, 2023. (AP Photo/Gene J. Puskar)
            
              Ohio Governor Mike DeWine points to a map of East Palestine, Ohio that indicates the area that has been evacuated as a result of Norfolk Southern train derailment, after touring the site, Monday, Feb. 6, 2023, in East Palestine, Ohio. (AP Photo/Gene J. Puskar)
            
              A road closure sign stands in East Palestine, Ohio, on Tuesday, Feb. 7, 2023. About 50 cars, including 10 carry hazardous materials, derailed in a fiery crash Friday night. Ohio and Pennsylvania residents living close to the wreckage were forced to evacuate the area and aren't being allowed into their homes, authorities said Tuesday. (AP Photo/Patrick Orsagos)
            
              An Ohio State Trooper car sits parked next to a blockade in East Palestine, Ohio, on Tuesday, Feb. 7, 2023. About 50 cars, including 10 carry hazardous materials, derailed in a fiery crash Friday night. Ohio and Pennsylvania residents living close to the wreckage were forced to evacuate the area and aren't being allowed into their homes, authorities said Tuesday. (AP Photo/Patrick Orsagos)
            
              A man takes photos as a black plume rises over East Palestine, Ohio, as a result of a controlled detonation of a portion of the derailed Norfolk Southern trains Monday, Feb. 6, 2023. (AP Photo/Gene J. Puskar)