Reports say it could have been an early test for the SR-72 ... the SR-71 Blackbird spy plane. The SR-71 was capable of reaching speeds over three times the speed of sound, and the SR-72 is ...
The SR-71 was fast — so fast it set records that have yet to be broken. Speed like that makes it difficult to see and fire upon, and no SR-71 was ever shot down, making it a highly successful ...
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