Acting National Transportation Safety Board Chairman Christopher Hart gestures as he speaks about the recent Metro subway fire earlier this month in D.C., during a Capitol Hill news conference in Washington, Wednesday, Jan. 21, 2015. One woman was killed and more than 80 were sent to hospitals with smoke inhalation after a subway train filled with smoke inside a tunnel near the busy L’Enfant Plaza station in downtown Washington. Authorities have said an electrical malfunction caused the smoke, and it took 44 minutes for Metro to shut off power to the affected section of rail.(AP Photo/Cliff Owen)
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