Edgar Mitchell
Apollo 14 astronaut that once said he was "in on the fact that we've been visited on this planet ... UFO phenomenon is real."
Edgar Mitchell was an American aviator, astronaut and aeronautical engineer who, in 1971, was part of the Apollo 14 mission. After his NASA career he became a vocal advocate for the existence of UFOs and extraterrestrial life, stating that he had personal experience with such phenomena during his time as an astronaut. He had a large personal UFO research collection, and It is alleged that he confirmed the famous Wilson Davis memo was real.