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We Don’t Really Know If the Mach 6 SR-72 Darkstar Is Real

Key Points and Summary – The SR-72 “Darkstar” is the long-rumored hypersonic successor to the legendary SR-71 Blackbird, a secret project from Lockheed Martin’s Skunk Works designed to fly at over Mach 6. While the program’s existence is acknowledged, it remains shrouded in mystery, with no prototype ever publicly seen and timelines for a first flight repeatedly missed. Speculation intensified after Lockheed confirmed its involvement with the fi…
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nationalsecurityjournal.org broke the news in on Friday, July 25, 2025.
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