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

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

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

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

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

Investigators found the helicopter was flying higher than it should have been over the Potomac River in Washington. Its ...

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

The NTSB showed the harrowing video of the Jan. 29 crash over the Potomac River as the agency kicked off a three-day hearing ...

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 ...

According to the NTSB's investigation, the military helicopter had a faulty altimeter, which contributed to the collision ...