Timmay

En route to Seattle, Cooper handed a flight attendant a note saying that he had a bomb and that the plane was being hijacked. He ordered the pilots to arrange for four parachutes and $200k to be ready in Seattle upon their arrival. Once there, everybody but one flight attendant and two pilots exited the aircraft. The money and parachutes were loaded onto the plane, and Cooper commanded that it be flown towards Mexico, at 170 knots, gear down, flaps 15, and below 10,000'. He had the flight attendant lower the rear door, then move up to the cockpit. That was the last anybody saw of him.

Dan Cooper was the name he used to purchase the ticket in Portland. Authorities, after the hijacking, interrogated and released a "D.B. Cooper" who was never considered a significant suspect, but the media hung onto the name and it has stuck ever since.