It is the only unsolved hijacking in U.S. history — and claims from two women could possibly help solve it. Marla Cooper, from Oklahoma City, says that D.B. Cooper, who hijacked and threatened to blow up a commercial plane before parachuting to the ground carrying $200,000, was her uncle, who went by Lynn Doyle Cooper,
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Oklahoma Woman Claims Infamous Skyjacker D.B. Cooper Is Her Uncle