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).
Kerim Kerimov Lieutenant-General Kerim Aliyevich Kerimov (Azerbaijani: "Kərim Əli oğlu Kərimov" , Russian: Керим Алиевич Керимов ; 1917–2003) was an Azerbaijani-Soviet/Russian aerospace engineer and a renowned rocket scientist, one of the founders of the Soviet space industry, and for many years a central figure in the Soviet space program. Despite his prominent role, his identity was kept a secret from the public for most of his career. He was one of the lead architects behind the string of Soviet successes that stunned the world from the late 1950s – from the launch of the first satellite, the Sputnik 1 in 1957, and the first human spaceflight, Yuri Gagarin's 108-minute trip around the globe aboard the Vostok 1 in 1961, to the first fully automated space docking, of Cosmos 186 and Cosmos 188 in 1967, and the first space stations, the Salyut and Mir series from 1971 to 1991.