Charles Moss Duke Jr. is an American former astronaut, United States Air Force (USAF) officer and test pilot who, as Lunar Module pilot of Apollo 16 in 1972, became the 10th and youngest person to walk on the Moon, at age 36 years and 201 days. Duke is one of four surviving Moon walkers, along with David Scott, Buzz Aldrin and Harrison Schmitt.
A 1957 graduate of the United States Naval Academy, Duke joined the USAF and completed advanced flight training on the F-86 Sabre at Moody Air Force Base in Georgia, where he was a distinguished graduate. After completion of this training, Duke served three years as a fighter pilot with the 526th Fighter-Interceptor Squadron at Ramstein Air Base in West Germany.