GEMINI-TITAN (GT)-12 - ASTRONAUT TRAINING - UNDERWATER - MD

S66-54937 (29 Oct. 1966) --- Astronaut Edwin E. Aldrin Jr., pilot for the Gemini-12 spaceflight, practices egress procedures from a mock-up of his spacecraft during underwater zero-gravity training. He holds a telescoping handrail in his left hand which he will use to move from the spacecraft to the Agena Target Docking Vehicle. The underwater environment closely simulates the zero-gravity condition found in space. Photo credit: NASA