S88-31374 (29 April 1961) --- A close-up of astronaut Alan B. Shepard Jr. in his space suit with his helmet on inside the Mercury capsule. He is undergoing a flight simulation test with the capsule mated to the Redstone booster. This will be the first attempt to put a man into space by the U.S. aboard a Mercury spacecraft, launched atop a Redstone rocket. The suborbital trajectory will be down the Atlantic Missile Range. Photo credit: NASA or National Aeronautics and Space Administration