Tragedy struck in seconds when an American Airlines flight and an Army helicopter collided in the sky, leaving no known ...

Defense Secretary Pete Hegseth calls the deadly aircraft collision involving a Black Hawk and a civilian airliner "a tragedy" ...

The crew of the Army Black Hawk helicopter involved in the deadly collision with a jetliner had thousands of hours of flight ...

The collision between an American Airlines passenger jet and an Army helicopter at Ronald Reagan Washington National Airport ...

Through maps, videos, photos and radio transmissions, CNN is piecing together what occurred during the deadly, midair collision.