"Air Force Captain Charles E. ""Chuck"" Yeager and the rocket-powered Bell X 1, which he dubbed the ""Glamorous Glennis."" On October 14, 1947, Captain Yeager piloted the X-1 to Mach 1.06 (approximately 700 mph at 42,000 feet), becoming the first man to break the so-called ""sound barrier.""  (U.S. Air Force Photo courtesy AFFTC History Office)"
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