In March 1924 he served at McCook Field conducting aircraft acceleration tests. In July 1923 he entered Massachusetts Institute of Technology for special engineering courses and graduated the following year with a master of science degree, getting his doctor of science degree in Aeronautics a year later, and being one of the first men in the country to earn this degree. In the same year he received his bachelor of arts degree from the University of California, Berkeley. The military gave him the Distinguished Flying Cross for this historic feat. He made only one refueling stop at Kelly Field. He flew a DH-4, equipped with crude navigational instruments, in the first cross-country flight, from Pablo Beach, Fla., to San Diego, Calif., in 21 hours and 19 minutes.
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In September 1922 he made the first of many pioneering flights which earned him most of the major air trophies and international fame. He then took the Air Service Mechanical School and Aeronautical Engineering courses at Kelly Field and McCook Field, Ohio, respectively. On JDoolittle got his regular commission and promotion to first lieutenant.
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He then went to Kelly Field, Texas, for duty first with the 104th Aero Squadron, and next with the 90th Squadron on border patrol duty at Eagle Pass, Texas. and went back to Rockwell Field, chiefly as a flight leader and gunnery instructor.
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He was commissioned a second lieutenant in the Signal Corps' Aviation Section March 11, 1918, and served successively at Camp Dick, Texas Wright Field, Ohio Gerstner Field, La. He enlisted as a flying cadet in the Signal Corps Reserve in October 1917 and trained at the School of Military Aeronautics, University of California and Rockwell Field Calif. James "Jimmy" Doolittle was educated in Nome, Alaska, Los Angeles Junior College, and spent a year at the University of California School of Mines. James Harold Doolittle was born in Alameda, Calif., in 1896. Medal of Honor recipient, pioneering holder of speed records, leader of first aerial attack on the Japanese mainland, and famed World War II air commander.