John Young is a legendary American astronaut, test pilot, and aeronautical engineer who, in 1972, was the ninth person to walk on the Moon as commander of the Apollo 16 mission. Young had the longest, busiest and most diverse career of any astronaut in American history. Over the course of 19 years of active NASA service, he made six spaceflights, the first person to do so; and was the only person to have piloted four different classes of spacecraft: Gemini, the Apollo Command/Service Module, the Apollo Lunar Module, and the Space Shuttle. In 1965, Young flew the on the first manned...