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National Security Journal on MSN2d
‘We’re Entering the Mach 6 Era’: SR-72 Darkstar Summed Up in 2 WordsThe SR-72 “Darkstar,” the unofficial “Son of Blackbird,” is a top-secret, unmanned hypersonic aircraft in development by ...
The SR-71 Blackbird’s earned world record for speed has never been topped by a successor. The fastest jet to ever fly the ...
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