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In 1947, no one knew if it was possible to break the "sound barrier." The Bell X-1 was the tiny, rocket-powered craft that finally broke it. It was the result of innovative designers and engineers turning their attention from the pioneering jets of World War II to a new task--an aircraft designed purely to fly faster than sound. Legendary pilots rallied to the cause, with World War II ace Chuck Yeager piloting the X-1 when it finally achieved supersonic flight in 1947, the first manned craft to reach such speeds. With historical photographs and meticulously researched digital art, Peter...