No other plane in history has captured the hearts and minds of the American public quite like the SR-71 Blackbird, providing the West with an unprecedented look behind the Iron Curtain during its 33 year operational career. But before it was cracking the skies over Russia at mach 3.3, the Cold War spy plane had to prove itself during a series of test flights. The first of those took place on December 22, 1964.
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