Debris was removed from the Potomac River near Washington DC on Monday after two aircraft collided over the river on Wednesday night near the Ronald Reagan Airport.

An American Airlines regional jet collided with a U.S. Army Black Hawk helicopter on Wednesday night. Both aircraft plunged into the Potomac River near Reagan Airport.

Crews are on the scene on the Potomac River to retrieve the submerged wreckage of an airliner and an Army helicopter that collided midair in the deadliest U.S. air disaster since 2001.