FILE – In this June 2, 2015, file photo, then-acting Federal Railroad Administrator Sarah Feinberg testifies about the May 2015 derailment of an Amtrak train in Philadelphia, as part of a House Transportation and Infrastructure Committee oversight hearing on Capitol Hill in Washington. Feinberg leaves office Friday, Jan. 20, 2017, after a two-year tenure as the nation's chief railroad regulator, championing safety and technology initiatives that remain a work in progress. (AP Photo/Cliff Owen, File)
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