Neil Armstrong
Prior to being an astronaut, Armstrong was called to Pensacola Naval Air Station in Florida in 1949 before he could complete his degree. There he earned his pilots wings at 20 years of age, making him the youngest flyer in his squadron. While studying for his aeronautical engineering degree, the Korean War broke out in 1950, in which he flew 78 combat missions. His plane was shot down once and he was also awarded 3 Air Medals. Later, he became a skilful test pilot, flying right to the atmosphere’s edge,  at , in the experimental rocket powered aircraft the X-15.