Lockheed’s ‘Son of Blackbird’ spy plane might already be here

That’s why Lockheed’s secretive Skunk Works team has been developing the SR-72, dubbed “Son of Blackbird“, since at least 2007. This next generation spy plane will reportedly exceed its predecessor in nearly every way. Rumored to be powered by an air-breathing scramjet engine, the SR-72 will conceivably be capable of topping Mach 6 (4,000MPH), granting …

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