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The unsolved case of skyjacker D.B. Cooper is explored again in new Netflix documentary series - oregonlive.com
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Ralph Himmelsbach spent the last 9 years of his FBI career on the 1971 D.B. Cooper hijacking, and then put it squarely behind him — at least, until someone else brought it
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Unmasking American Legend D.B. Cooper, Who Got Away With Hijacking a Plane -- New York Magazine - Nymag
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