Dozens of people are dead after a regional jet collided with an Army Black Hawk helicopter Wednesday night over Washington, D.C., officials said, the nation's first major commercial airline crash since 2009.

The Army helicopter that slammed into a passenger plane on Wednesday night was on a 'routine annual retraining,' Sec. of Defense Pete Hegseth said.

Sixty passengers and four crew members from the plane and three Black Hawk helicopter personnel are feared dead as a recovery mission is underway.