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NTSB offers update on derailed train investigation

The NTSB holds a press conference about a derailed train in New York that killed four and injured dozens.

Workers walk past a Metro-North train car that was damaged in a derailment in the Bronx section of New York, Dec. 2, 2013.
Workers walk past a Metro-North train car that was damaged in a derailment in the Bronx section of New York, Dec. 2, 2013.AP

MS NOW staff