Investigators say poor track conditions caused a 2021 Amtrak derailment in Montana that killed three

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FILE - In this Sept. 27, 2021, file photo, workers stand near train tracks next to overturned cars from an Amtrak train that derailed near Joplin, Mont. A derailment of an Amtrak train in Montana that killed three people in 2021 was caused by a railroad track that was bent along a curve near the accident site, federal investigators said Thursday, July 27, 2023 in a final report. (AP Photo/Ted S. Warren, File)