"FILE - In this May 17, 2013 file photo, emergency workers arrive at the scene of a train collision in Fairfield, Conn, after two Metro-North commuter trains serving New York City collided during Friday's evening rush hour. According to a Federal Railroad Administration review prompted by another accident on Dec. 1, 2013 that killed four passengers and injured about 70 others, the Metro-North commuter railroad has allowed its emphasis on trains' on-time performance to ""routinely"" overshadow its safety operations. (AP Photo/The Connecticut Post, Christian Abraham, File) MANDATORY CREDIT"
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