On November 24, 1971, an unidentified man hijacked an airplane that was flying from Portland, Oregon, to Seattle, Washington.He demanded US$200,000 and told a flight attendant that he had weapons.After stopping in Seattle, the hijacker was given the money and he released the attendants.But he demanded that the pilots stay on-board, refuel, and fly him to Mexico City.Just thirty minutes after the plane took off, the man jumped out of the aircraft and parachuted away... never to be seen or heard from again. Did he escape with the money? Did he even survive the jump? Over fifty years later, the FBI still does not know what happened to the man they call 'D.B. Cooper.' Find out what we do know about one of America's most famous, unsolved mysteries in this book for young readers.