Ohio derailment aftermath: How worried should people be?


              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              Ohio Republican Gov. Mike DeWine provides an update on the train derailment in East Palestine, Ohio, Tuesday, Feb. 14, 2023. About 50 cars of a Norfolk Southern freight train derailed on Feb. 3. (AP Photo/Patrick Orsagos)
            
              People gather at the Norfolk Southern Railways Assistance Center Thursday, Feb. 9, 2013, at the Abundant Life Fellowship in East Palestine, Ohio. Cleanup continues of a Norfolk Southern freight train derailment that derailed Friday night in East Palestine, Ohio. (AP Photo/Gene J. Puskar)
            
              People gather at the Norfolk Southern Railways Assistance Center Thursday, Feb. 9, 2013, at the Abundant Life Fellowship in East Palestine, Ohio. Cleanup continues of a Norfolk Southern freight train derailment that derailed Friday night in East Palestine, Ohio. (AP Photo/Gene J. Puskar)
            
              Some of the railcars that derailed Friday night when a Norfolk Southern freight train derailed are in the process of being cleaned up on Thursday, Feb. 9, 2023 in East Palestine, Ohio.(AP Photo/Gene J. Puskar)
            
              The cleanup of portions of a Norfolk Southern freight train that derailed Friday night in East Palestine, Ohio, continues on Thursday, Feb. 9, 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 Monday, Feb. 6, 2023. (AP Photo/Gene J. Puskar)