Pilots of an Army helicopter that collided with a passenger jet near DC airport didn't know how high they were flying because of altimeter discrepancies.

The hearing opened Wednesday with a video animation showing where the helicopter and airliner were leading up to the crash.

A hearing investigating the mid-air collision over Ronald Reagan National Airport focused on the altitude of the U.S. Army ...

Investigators testifying at a hearing into the January's mid-air crash in Washington DC suggest faulty altitude data may have ...

Investigators testifying at a hearing into the January's mid-air crash in DC suggest faulty altitude data may have led to a ...

Family members of the 67 people killed in a January midair collision in Washington, D.C. are attending a three-day hearing being held by the National Transportation Safety Board, where several new ...

The National Transportation Safety Board released new details Wednesday about the final moments before a mid-air crash ...

The helicopter’s altitude-measuring instrument was also inaccurate, investigators said at the first of three days of hearings examining the January crash.

WASHINGTON, D.C. (WAVY) — Wednesday, the National Transportation Safety Board (NTSB) has begun a three-day investigative ...