Eight top-secret aircraft that definitely aren’t UFOs
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Since its establishment in 1955, the Groom Lake airfield at Edwards Air Force Base—better known as Area 51—has hosted the development of some of the most exotic and advanced aircraft the world has ever seen. These so-called black projects, named for their ultra-classified nature, have produced planes like the SR-71 Blackbird, which is still the fastest and highest-operating aircraft ever built (that we know about); the F-117 Nighthawk, the world’s first stealth attack aircraft; and the RQ-170, a mysterious and seldom-seen aerial reconnaissance UAV.



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