Recently declassified files of a US intelligence agency reveal details of one of the earliest supersonic spy drones, which was sent on a secret mission and never returned. 30 Times Faster Than Speed Of Sound: Is China Really Winning The Hypersonic Race With Its JF-22 Wind Tunnel? The National Reconnaissance Office declassified some documents that highlight a … Continue reading Supersonic Drone Missing: Where Is The US ‘Spy Drone’ That Flew On A Secret Mission & Never Returned?
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