National Security Journal on MSN
In 1964, Lockheed Skunk Works Built a ‘SR-71’ Drone That Hit Mach 3 and 95,000 Feet — Many Drones Today Can’t Match It
The D-21B was the SR-71 Blackbird’s little brother—a Mach 3 spy drone built by Lockheed’s legendary Skunk Works division to ...
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