A long Norfolk Southern freight train passes through the town of East Palestine, Ohio on Jan. 17. Daranee Balachandar/Howard Center for Investigative Journalism hide caption
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Smoke rises from a derailed cargo train in East Palestine, Ohio, in February of 2023. DUSTIN FRANZ/AFP via Getty Images hide caption
President Biden talks with East Palestine, Ohio Mayor Trent Conaway during a tour of the site where a train carrying toxic chemicals derailed a year ago. Andrew Harnik/AP hide caption
Christina Dilworth remains worried about possible health impacts of the derailment. Elizabeth Gillis/NPR hide caption
The Wahweap Marina, squeezed by the dropping and encroaching shoreline of Lake Powell on the Colorado River behind the Glen Canyon Dam outside Page, Ariz., on Feb. 20, 2023. The bathtub ring marking the once-high level of the lake is visible on the red rock formations in the distance. Full story here. Hart Van Denburg/CPR News hide caption
Smoke rises from a derailed cargo train in East Palestine, Ohio, on February 4, 2023. Dustin Franz/AFP via Getty Images hide caption
Portions of a Norfolk Southern freight train that derailed in East Palestine, Ohio on Feb. 3 remained on fire the next day. Gene J. Puskar/AP hide caption
When train crashes leak harmful chemicals, small town firefighters can be vulnerable
A cleanup worker stands on a derailed tank car of a Norfolk Southern freight train in East Palestine, Ohio, continues, Feb. 15, 2023. Gene J. Puskar/AP hide caption
Ron Fodo, Ohio EPA Emergency Response, looks for signs of fish and also agitates the water in Leslie Run creek to check for chemicals that have settled at the bottom following a train derailment that is causing environmental concerns on February 20, 2023 in East Palestine, Ohio. Michael Swensen/Getty Images hide caption
How the EPA assesses health risks after the Ohio train derailment
Workers remove contaminated dirt near the railroad tracks on February 14, 2023 in East Palestine, Ohio. Angelo Merendino/Getty Images hide caption
This week, workers continued to clean up the derailed tank cars in East Palestine following the Feb. 3 crash. Matt Freed/AP hide caption
Here's the most thorough explanation yet for the train derailment in East Palestine
Ohio Gov. Mike DeWine greets Pennsylvania Gov. Josh Shapiro during a news conference in East Palestine, Ohio, on Feb. 21. Matt Freed/AP hide caption
Governor's office in Pennsylvania makes a criminal referral in Ohio train derailment
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. Gene J. Puskar/AP hide caption