The military helicopter that collided with a regional jet near Ronald Reagan Washington National Airport, in a crash that killed all 67 people aboard both aircraft, was a UH-60 Black Hawk, considered the “workhorse” of U.

Rescue craft are in the Potomac River below the site of the collision with D.C. fire chief John Donnelly saying "we don't know" if there are any survivors.

A deadly collision on Wednesday night between an American Airlines plane with 60 passengers and four crew members and an Army UH-60 Black Hawk helicopter with three soldiers remains under investigation amid questions about how the crash occurred.