D. B. Cooper is a media epithet for an unidentified man who hijacked Northwest Orient Airlines Flight 305, a Boeing 727 aircraft, in United States airspace on November 24, 1971. During the flight from Portland, Oregon, to Seattle, Washington, the hijacker told a flight attendant he was armed with a bomb, demanded $200,000 in ransom (), and requested four parachutes upon landing in Seattle. After releasing the passengers in Seattle, the hijacker instructed the flight crew to refuel the aircraft and begin a second flight to Mexico City, with a refueling stop in Reno, Nevada. About 30 minutes after taking off from Seattle, the hijacker opened the aircraft's aft door, deployed the staircase, and parachuted into the night over southwestern Washington. The hijacker has never been found or conclusively identified.
In 1980, a small portion of the ransom money was found along the banks of the Columbia River. The discovery of the money renewed public interest in the mystery, but yielded no add