The D. B. Cooper Case (unresolved mystery)

The D. B. Cooper case is a famous unsolved mystery from 1971. A man hijacked a Northwest Orient Airlines plane, claiming he had a bomb, and got $200,000 in ransom. After the exchange, he parachuted from the plane over Washington state and disappeared into the night. Despite extensive searches, neither Cooper nor the money was ever found. The case remains one of the greatest unsolved aviation mysteries, prompting numerous theories but no conclusive evidence about his identity or fate.