A superfast unmanned military plane traveled at 20 times the speed of sound and managed to control itself for three minutes before crashing into the Pacific Ocean in a recent test, military officials ...
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The Mach 6 SR-72 Darkstar May Never Fly
Key Points and Summary - This analysis debates the U.S. Air Force's need for the secretive, Mach 6+ SR-72 hypersonic aircraft. -Proponents laud its game-changing speed, arguing it can penetrate any ...
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