William Rockefeller fell asleep at the controls of the Metro-North train that derailed in The Bronx.
An NTSB report is expected to show that William Rockefeller suffered from the sleep disorder.
The federal investigators will now analyze parts of the pipe that ran under the Park Avenue buildings.
The 8-inch gas pipe that supplied the two buildings failed federal investigators' tests.
James Romansoff died after a Poughkeepsie-bound train hit him in East Harlem, officials said.
A funeral for Kisook Ahn will take place at 10:30 a.m. Saturday at St. Sebastian's Church in Woodside.
There was nothing wrong with the brakes on the Metro-North train that crashed near Spuyten Duyvil.
The MTA planned to provide near full service on the Hudson Line, with scattered delays.
The engineer woke up and tried to hit the brakes to stop the speeding train, sources said.
Investigators would not say if the cause of the crash was human error or mechanical malfunction.
Gov. Andrew Cuomo said he believes excess speed caused seven cars of a Metro-North train to derail.
Two days after a helicopter crash killed one and left two others critically injured, investigators have come one step closer to ruling out engine fault as a cause.
A national review into the discount bus industry could result in regulation changes.
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