Investigators so far have highlighted several factors that may have contributed to the collision, which left 67 people dead.

Air traffic controller failed to notify commercial plane crew about approaching Army helicopter before Washington D.C.

The Army helicopter that collided with a plane over D.C. in January had incorrect altitude readings, contributing to the ...

Friday was the final day of the National Transportation Safety Board's (NTSB) three-day hearing on the deadly plane crash at ...

Clark Allen, the former operations manager of the control tower at DCA, was asked Thursday about the training for the air ...

The new details were part of thousands of documents -- including new video from the end of the runway showing the crash -- the National Transportation Safety Board released.

An emotional three days of hearings into the January midair crash between an Army helicopter and a passenger jet wrapped up ...

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

The communications between pilots and air traffic control were laid out in a visual timeline in Day One of the NTSB ...

The National Transportation Safety Board (NTSB) is holding a three-day hearing on the deadly plane crash at Reagan Airport ...

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