The first one to reach outer space in the Man In Space Soonest program was which Captain in the United States Air Force, an American World War II pilot, an experimental physicist, and NASA test pilot?
Joseph A. Walker Joseph Albert "Joe" Walker (February 20, 1921 – June 8, 1966) flew the world's first two spaceplane flights in 1963, thereby becoming the United States' seventh man in space. Walker was a Captain in the United States Air Force, an American World War II pilot, an experimental physicist, a NASA test pilot, and a member of the U.S. Air Force Man In Space Soonest spaceflight program. His two X-15 experimental rocket aircraft flights in 1963 that exceeded the Kármán line – the altitude of 100 km , generally considered to mark the threshold of outer space – qualified him as an astronaut under the rules of the U.S. Air Force and the Fédération Aéronautique Internationale (FAI).
Robert A. Lewis Robert Alvin Lewis (October 18, 1917 – June 18, 1983) was a United States Army Air Forces officer serving in the Pacific Theatre during World War II. He was the co-pilot of the "Enola Gay", the B-29 Superfortress bomber which dropped the atomic bomb Little Boy on the Japanese city of Hiroshima on 6 August 1945.