National Security Journal on MSN
The Mach 3 SR-71 Blackbird Spy Plane ‘Broke All the Rules’ Thanks to Titanium
In one of the greatest ironies of the Cold War, the U.S. had to secretly buy the titanium needed to build the Mach 3+ SR-71 ...
Watch the impressive engineering in this in-depth tour of the SR-71 Blackbird's jet engine and you'll see an extraordinary reconnaissance aircraft that still impresses despite taking its first flight ...
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