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
Neil Armstrong future, destines our nation to become one of second or even third rate stature". Armstrong also publicly recalled his initial concerns about the Apollo 11 mission, when he had believed there was only a 50% chance of landing on the Moon. "I was elated, ecstatic and extremely surprised that we were successful", he later said. On November 18, 2010, aged 80, Armstrong said in a speech during the "Science & Technology Summit" in The Hague, Netherlands, that he would offer his services as commander on a mission to Mars if he were asked. Neil Armstrong Neil Alden Armstrong (August 5,