There were no survivors after an American Airlines regional jet with 64 people aboard collided with a Black Hawk military helicopter moments before the airplane was set to land at Washington, D.C.'s Ronald Reagan Washington National Airport on Wednesday night, officials said. The accident was the worst air disaster in the U.S. since 2001.

An American Airlines plane carrying 60 passengers and four crew members collided with an Army Black Hawk helicopter outside Reagan National Airport near Washington, D.C. Wednesday night. A D.C. fire official said Thursday that “we don't think there are any survivors from this accident" and "we are switching from a rescue operation to a recovery operation.

While landing at Ronald Reagan Washington National Airport in Washington, D.C., on Wednesday shortly before 9 p.m., American Airlines Flight 5342 collided with an Army Black Hawk helicopter and crashed into the icy Potomac River.

The pilot and first officer on the American Airlines plane that crashed into a military helicopter Wednesday night—killing all 64 people on board—have been identified by a colleague and family member as victims alongside American and Russian figure skaters,

One of the air traffic controllers on duty was allowed to go home early, leaving just one controller in charge, according to reports.

Audio from the American Airlines plane crash in Washington DC documents air traffic control's reaction to the collision.