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Who was DB Cooper? FBI gives up on plane-hijacking mystery
Speed Read One of the greatest mysteries in US history looks set to go unsolved after officials close 45-year investigation
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Will Nasa's Quesst project be the next Concorde?
Speed Read Lockheed Martin charged with initial designs to create plane capable of breaking the sound barrier - quietly
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Teenager flies from Sheffield to Essex via Berlin to save cash
Speed Read Expert money saver says 13-hour trip was cheaper and included a visit to the Brandenburg Gate
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