Maintenance may be culprit in Conn. train derailment
NTSB go-team heads back to Washington
The National Transportation Safety Board (NTSB) is focusing on maintenance work done on the track in its ongoing investigation into the May 17 derailment and collision of two Metro-North trains near Bridgeport, Conn.
The accident along a busy New York–New Haven corridor injured more than 70 people, at least five of them critically.