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

The National Transportation Safety Board, during hearings on Thursday, grilled officials from the Army, air traffic ...

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

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

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

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

The NTSB began its hearings looking into the deadly January air crash between a military vehicle and a passenger jet.

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 ...

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 will wrap up its public testimony about the fatal midair crash between an Army ...