All 64 people aboard an American Airlines jet that collided with an Army helicopter were feared dead in what was likely to be the worst U.S. aviation disaster in almost a quarter century, officials said Thursday.

The U.S. Army helicopter that collided with a passenger jet in Washington was being operated on a training flight by a "fairly experienced crew" with night-vision goggles, Defense Secretary Pete Hegseth said on Thursday,

A midair collision between an Army helicopter and an American Airlines flight killed all 67 people aboard the two aircraft, officials said Thursday, as they scrutinized the actions of the military pilot and reported that control tower staffing was “not normal” at the time of the country's worst aviation disaster in a generation.