• 7 years ago
NASA just released footage of the SR-71 — the ultimate spy plane.

It's the world fastest manned aircraft, flying at three times the speed of sound. But the SR-71 isn't actually new plane — it's been around for decades, built in the 1960s for the U.S. Air Force to evade Soviet missile defense systems. While the plane isn't new, the footage is.

Over the next 30 years, the SR-71 was used in thousands of covert missions since its altitude and speed made it difficult to detect. While the SR-71 has been retired, Lockheed Martin confirmed it's building a new SR-72 plane.

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