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U.S. Air Force Secret SR-91 Aurora, Hypersonic Aircraft Capable of a Mach-6

U.S. Air Force Secret SR-91 Aurora, Hypersonic Aircraft Capable of a Mach-6 US Air Force Secret SR-91 Aurora, Hypersonic Aircraft Capable of a Mach 6.
Aurora also known as SR-91 is the popular name of hypothesized American reconnaissance aircraft.
It is believed that SR-91 Aurora is capable of hypersonic flight at speeds of Mach 5+.
Aurora was developed in the 1980s or 1990s as a replacement for the aging and expensive SR-71 Blackbird.
Does the US Air Force have a secret SR-91 Aurora hypersonic aircraft capable of a Mach 6 performance?

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