On November 24, 1971, a man calling himself Dan Cooper boarded a one-way flight from Portland to Seattle. Shortly after takeoff, he informed the flight attendant that he had a bomb in his briefcase and demanded four parachutes and $200,000 in ransom. After his demands were met in Seattle, the plane took off again bound for Reno, Nevada. Upon opening the aft stairs, the hijacker jumped out somewhere over southern Washington and disappeared. The incident remains the only unsolved hijacking in U.S. history.
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