In this Dec. 1, 2013 file photo, a Metro-North passenger train is derailed on a curved section of track in the Bronx borough of New York. The National Transportation Safety Board said Tuesday, Oct. 28, 2014 that the sleep-deprived engineer nodded off at the controls of the commuter train just before taking a 30 mph curve at 82 mph, causing the derailment that killed four people and injured more than 70. Photo: Mark Lennihan, AP Christopher Hart, acting chairman of the National Transportation Safety Board, center, speaks while surrounded by senators Chuck Schumer , left, and Richard Blumenthal during a news conference in New York, Tuesday, Oct. 28, 2014.
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