“To send humans back to the moon would not be advancing. It would be more than 50 years after the first moon landing when we got there, and we'd probably be welcomed by the Chinese. But we should return to the moon without astronauts and build, with robots, an international lunar base, so that we know how to build a base on Mars robotically.”

American former astronaut, aeronautical engineer, and fighter pilot

Buzz Aldrin is an American former astronaut, aeronautical engineer, and fighter pilot. He is known for being the second person to walk on the Moon, following mission commander Neil Armstrong. Aldrin served as the pilot of NASA’s Gemini 12 mission in 1966, during which he made three spacewalks. He later flew as the Lunar Module Eagle pilot on Apollo 11 in 1969. He is now the last surviving member of that crew and the oldest living astronaut.