The NTSB will hold hearings to investigate the Jan. 29 crash between an American Airlines jet and an Army Black Hawk helicopter, examining potential factors including altimeter issues on the helicopter and the use of night vision goggles.

Investigators have found that a helicopter involved in a deadly crash with a passenger plane over Washington was flying above its height limit.

On Wednesday morning, the NTSB released thousands of pages of evidence from the crash and the subsequent investigation -- including new video from the end of the runway showing the crash that killed 67 people.