In this Jan. 12, 2015 file photo, a woman is transported in a wheelchair onto an ambulance as people are evacuated from a smoke filled Metro subway tunnel in Washington. A policy of routing calls about emergencies on the Metro subway system directly to a supervisor at the District of Columbia’s 911 call center contributed to delays in getting firefighters to the scene of an accident that turned deadly, officials say. (AP Photo/Jacquelyn Martin, File) — FILE
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