An NTSB investigation into a fatal helicopter-airplane collision in D.C. revealed a faulty helicopter altimeter and prior ...

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 ...

The NTSB heard testimony from air traffic controllers, the Federal Aviation Administration and the Army about the mid-air collision of an Army helicopter and passenger plane.

Investigators probing the January midair collision of a passenger plane and an Army helicopter over Washington that killed 67 ...

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

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

Three days of investigative hearings on the deadly midair collision over Washington in January begin Wednesday.

Hours of testimony and thousands of pages of documents made public Wednesday by federal accident investigators probing the deadliest U.S. airline crash in decades painted a picture of the airspace in ...