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

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

On Wednesday morning, the NTSB released thousands of pages of evidence from the crash and the subsequent investigation -- ...

The first of the National Transportation Safety Board’s three days of investigative hearings is underway to help determine ...

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

The National Transportation Safety Board on July 30 played an animation of the deadly midair collision near Washington's ...