What do we know about the mystery of D. B. Cooper?
"On November 24, 1971, an unidentified man hijacked an airplane that was flying from Portland, Oregon, to Seattle, Washington. He demanded $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 aircra...