USA Today highlighted the short list of people, all American, who have set foot on the moon, including the first, who left NASA to teach aerospace engineering at the University of Cincinnati.
Neil Armstrong was the first of just 12 people to walk on the moon as part of the Apollo missions between 1968 and 1972. An estimated 650 million people around the world watched as Armstrong took that historic first step with his famous line, "That's one small step for man; one giant leap for mankind."
Aldrin and astronaut Edwin "Buzz" Aldrin spent 21 hours exploring the moon's surface, collecting moon rocks and taking photos while astronaut Michael Collins orbited in the command module above them.
NASA's Artemis missions in 2025 will send astronauts back to the moon for orbiting and eventual landing on the lunar south pole. The landing crew will include a Japanese astronaut.

UC College of Engineering and Applied Science Professor Neil Armstrong teaches in his aerospace engineering classroom. Photo/UC Marketing + Brand