Harry George Armstrong

Harry George Armstrong was a Major General in the United States Air Force, a physician, and an airman. He is widely recognized as a pioneer in the field of aviation medicine. The Armstrong Limit, the altitude above which water boils at the temperature of the human body, is named after him.

Armstrong was born in De Smet, South Dakota, in 1899. He attended the University of Minnesota, but left after one year to enlist in the US Marine Corps, serving with them as a private from October 1918 to March 1919. He then entered the University of South Dakota, graduating in 1921. In 1925 he received his Doctor of Medicine Degree from the University of Louisville. He entered the Medical Corps Reserve in April 1925. Armstrong entered the School of Aviation Medicine at Brooks Field, Texas, that September. Upon graduation in 1930, he was commissioned a first lieutenant in the Regular Army Medical Corps. In 1931, he was attached to the Air Corps and assigned as assistant surgeon. He was promoted to captain in 1932, to major in 1938, lieutenant colonel in February 1942, and to colonel in August 1942. Serving alternately in England and the United States, in 1945 he became surgeon for the Air Division in the office of Military Government for Germany , with headquarters in Berlin. In 1946

Source: Wikipedia