Hypersonic USAF warplane REVEALED? Google Earth images ‘spot craft’

Hypersonic USAF warplane REVEALED? Google Earth images ‘spot craft’

Lockheed Martin, in coordination with the US Air Force, has been working on the development of a replacement for the venerable SR-71. The new plane is rumored to be a hypersonic craft capable of flying at speeds up to 4,600...
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