National Security Journal on MSN

NASA’s X-43A flew at Mach 9.6 and 110,000 feet: No air-breathing aircraft has gone faster in the 22 years since that flight

NASA’s X-43A scramjet aircraft hit Mach 9.64 at 110,000 feet in November 2004—and that record for an air-breathing aircraft ...
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Mach 15? NASA’s 1st Hypersonic Jet Concept That Never Flew But Is Still Relevant Today

Hypersonic flight is no longer science fiction. In recent years, interest in aircraft capable of exceeding Mach 5 has surged, driven by strategic competition, defense challenges, and NASA’s pursuit of ...