At the height of the Cold War, Lockheed's Skunk Works designed an airplane that would prove to be the greatest photoreconnaissance aircraft ever built. The SR-71 Blackbird could fly through any airspace in the world with near impunity. It flew so high and fast that even surface-to-air missiles were largely ineffective against it. This Mach 3-plus jet was designed and built by Lockheed's genius Kelly Johnson and his staff (story, P. 24).
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