Pilots of an Army helicopter that collided with a passenger jet near DC airport didn't know how high they were flying because of altimeter discrepancies.

Federal investigators opened a three-day inquiry Wednesday into the January plane crash that killed 67 people over Washington, D. C.

Transportation safety officials’ hearing reveals new details into what led to the January accident that killed 67 people.

NTSB investigators found the helicopter recorded incorrect altitude data before colliding with a flight departing from ...

Hearings began on the deadly midair collision between a passenger plane and a Black Hawk helicopter over Washington, D.C., in ...