Black Hawk helicopter may not have heard order to go behind American Airlines jet - The Army helicopter appeared to be experiencing other issues with its communications and technology, according to sa

Investigators suspect the Army helicopter crew that collided with an American Airlines jet near Washington, D.C., might have had inaccurate altitude readings and missed key air traffic controller instructions.

The investigation into the crash that saw 67 people die is still ongoing as authorities try and pinpoint the cause.