​Boeing's Bird of Prey: A Prototype Jet Worthy of the Klingon Empire

From the U-2 Dragon Lady and A-12 Oxcart , to the SR-71 Blackbird and D-12 Ramjet Drone , there's been no shortage of exotic aircraft (and UFO sightings) in the skies over Nevada's Area 51. But among the most extreme examples of bleeding-edge avionic design tested was the otherworldly Boeing Bird of Prey.

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