Neil Armstrong
Gemini 8

The crews for Gemini 8 were assigned on September 20, 1965. Under the normal rotation system, the backup crew for one mission became the prime crew for the third mission after, but Slayton designated David Scott as the pilot of Gemini 8. Scott was the first member of the third group of astronauts, who was selected on October 18, 1963, to receive a prime crew assignment. See was designated to command Gemini 9. Henceforth, each Gemini mission was commanded by a member of Armstrong's group, with a member of Scott's group as the pilot. Conrad would be Armstrong's backup this time, and Richard F. Gordon Jr. his pilot. Armstrong became the first American civilian in space. (Valentina Tereshkova of the Soviet Union had become the first civilian—and first woman—nearly three years earlier aboard Vostok 6 when it launched on June 16, 1963.) Armstrong would also be the last of his group to fly in space, as See died in a T-38 crash on February 28, 1966, that also took the life of crewmate Charles Bassett. They were replaced by the backup crew of Tom Stafford and Gene Cernan, while Jim Lovell and Buzz Aldrin moved up from the backup crew of Gemini 10 to become the backup for Gemini 9, and would eventually fly Gemini 12.
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