SR-72
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A New 'SR-71' Spy Plane Could Soon Return To the Skies (At Hypersonic Speeds)
More Than A SR-71: America's Next Super Spy Plane Could Launch Missiles
If Lockheed Martin's Hypersonic SR-72 Jet Is Successful, Flight Will Never Be The Same
The Mach 5 SR-72 Spy Plane Could Already Be Flying (Maybe)
A New SR-71 Spy Plane Could Be a Mach 6 Super Bomber
Stories From SR-72
