Chuck Yeager, a former US Air Force officer who was at one time the fastest man on the planet, died on Monday aged 97. NBCNews in the United States reports that on October 14, 1947, Yeager became the first test pilot to break the sound barrier as he flew the experimental Bell XS-1 (later X-1) rocket plane, named “Glamourous Glenis” after his wife, over Muroc Dry Lake in California. Yeager’s feat was kept top secret for about a year when the world thought the British had broken the sound barrier first but sixty-five years later to the minute, on Oct. 14, 2012, Yeager commemorated the feat, flying in the back seat of an F-15 Eagle as it broke the sound barrier at more than 30,000 feet above California’s Mojave Desert.