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

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.

At their closest points, helicopters and planes routinely flew within 75 feet near the airport, according to the NTSB.

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

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

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

The National Transportation Safety Board will wrap up its public testimony about the fatal midair crash between an Army ...

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

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

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