Charles Elwood "Chuck" Yeager (born February 13, 1923) is a former United States Air Force officer and record-setting test pilot. In 1947, he became the first pilot confirmed to have exceeded the speed of sound in level flight.

Supersonic travel is a rate of travel of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343 m/s, 1,125 ft/s, 768 mph, 667 knots, or 1,235 km/h.

Yeager's career began in World War II as a private in the United States Army Air Forces. After serving as an aircraft mechanic, in September 1942 he entered enlisted pilot training and upon graduation was promoted to the rank of flight officer (the World War II USAAF equivalent to warrant officer) and became a P-51 fighter pilot.

After the war, Yeager became a test pilot of many types of aircraft, including experimental rocket-powered aircraft. As the first human to officially break the sound barrier, on October 14, 1947, he flew the experimental Bell X-1 at Mach 1.07 at an altitude of 45,000 ft (13,700 m).

Yeager later commanded fighter squadrons and wings in Germany, and in Southeast Asia during the Vietnam War, and in recognition of the outstanding performance ratings of those units he was promoted to brigadier general. Yeager's flying career spans more than 60 years and has taken him to every corner of the globe, including the Soviet Union during the height of the Cold War.

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