Project Mercury also excluded civilian NASA X-15 pilot Neil Armstrong, though he had been selected by the US Air Force in 1958 for its Man In Space Soonest program, which was replaced by Mercury. Although Armstrong had been a combat-experienced NAP during the Korean War, he left active duty in 1952. Armstrong became NASA's first civilian astronaut in 1962 when he was selected for NASA's second group, and became the first man on the Moon in 1969. It was further stipulated that candidates should be between 25 and 40 years old, no taller than , and hold a college degree in a
First Man: The Life of Neil A. Armstrong Man" project in the mid-2010s. Damien Chazelle, a director receiving critical acclaim for his work in 2016's "La La Land", signed onto the film's production. Actor Ryan Gosling, who starred in "La La Land", joined as well. Given his role as the book's author, Hansen was attached to co-produce the movie. First Man: The Life of Neil A. Armstrong First Man: The Life of Neil A. Armstrong is the official biography of Neil Armstrong, the astronaut who became the first man to walk on the Moon, on July 20, 1969. The book was written by James R. Hansen, and was