Just about any young male college graduate with experience in a physically dangerous pursuit would do, so long as he was under five feet eleven and could fit into the Mercury capsule. The announcement calling for volunteers did mention test pilots as being among the types of men who might qualify, but it also mentioned submarine crew members, parachute jumpers, arctic explorers, mountain climbers, deep sea divers, even scuba divers, combat veterans, and, for that matter, mere veterans of combat training, and men who had served as test subjects for acceleration and atmospheric pressure tests,
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