A long list of things went wrong in January and contributed to the collision between an Army helicopter and an American ...

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

The NTSB concluded three days of investigative hearings into the collision between an Army helicopter and a passenger plane ...

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

An investigative hearing into a deadly mid-air collision of a US Army helicopter and a passenger plane that killed 67 people in Washington has revealed a discrepancy in the chopper’s altitude displays ...

A deadly midair collision occurred in Washington this January. Sixty-seven people died in the accident. A broken altimeter ...

Incorrect altitude readings on the Army helicopter that collided with a passenger plane over Washington, D.C., in January ...

Air traffic controllers reportedly warned about the hazards of helicopter traffic near the airport for years leading up to ...

The National Transportation Safety Board is launching a three-day investigation hearing on the D.C. plane crash that left 67 ...

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

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.

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