Investigators are searching for answers after the midair collision that killed 67 people near Washington, D.C.

The collision occurred in airspace that is difficult to navigate. Flight data, video and air traffic control audio show how the tragedy unfolded.

Officials say no survivors after a passenger jet crashed with an Army helicopter on approach to a Washington, D.C., airport. Here's what we know.

An American Airlines jet and a U.S. Army helicopter plunged into the Potomac River after a midair collision Wednesday night ...