By Thom Patterson @CNNMoney June 16, 2017: 5:33 PM ET
1991: Mysterious stealth
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The US Air Force pulled back the curtain of secrecy by putting its stealthy Lockheed F-117 Nighthawk on display at Paris in 1991 following the Gulf War.
Spectators were allowed to look -- but guards made sure they couldn't touch -- the covert tech surface of this mysterious attack jet.