SR-72 Revealed
Bill Sweetman says a picture taken by him at a recent DARPA exhibition shows the lead-in demonstrator for the SR-72.
The HTV-3X is actually a demonstrator for the USAF Falcon program and it aims to take-off and land on its own power and achieve a speed of Mach 6.
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An SR-72? Lockheed Martin’s New Mach-6 Spy Plane
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