A person on the flight said it “dove aggressively” and that people flew out of their seats. The flight landed safely at its destination, Las Vegas.

The passenger jet was responding to an alert of another aircraft in the vicinity, federal authorities said. A Cold War-era military plane was nearby at the time.

Passengers onboard a Southwest Airlines flight from Burbank to Las Vegas said their pilot "aggressively" dived to avoid a midair collision.