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 (NTSB) is holding a three-day hearing on the deadly plane crash at Reagan Airport ...

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 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 ...