HOBOKEN, N.J. (AP) — National Transportation Safety Board investigators held off questioning the engineer in the deadly Hoboken train crash because of his injuries Friday and struggled to lift clues from the train's black box recorders. Authorities want to know why the NJ Transit commuter train with engineer Thomas Gallagher at the controls smashed through a steel-and-concrete bumper and hurtled into the station's waiting area Thursday morning. NTSB vice chair T.