The Black Hawk that collided with an American Airlines jet in January may not have had accurate altitude readings, investigators said.

The National Transportation Safety Board has finished on-scene investigation of January's fatal crash between a regional jet ...

On Jan. 29, an American Airlines passenger jet and an Army helicopter collided as the plane prepared to land at Washington D.C.’s Ronald Reagan National Airport.

The U.S. Army Black Hawk crew possibly didn't know there was an impending collision with a American Airlines jet in ...

The National Transportation Safety Board said the helicopter’s cockpit voice recorder didn’t capture key directions from ...