On October 14, 1947, the Bell X-1 became the first airplane tofly faster than the speed of sound. Piloted by Air Force Capt. Charles E. "Chuck" Yeager, the X-1 reached a speed of 1,127 kilometers (700 miles) per hour, Mach , at an altitude of 13,000 meters (43,000 feet). Yeager named the airplane "Glamorous Glennis" in tribute to his wife.

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Keywords: air, airforce, force, military, states, united, usa