English: 1941: First and only American fighter ace of Korean descent Ohr was born in Portland, Ore., in 1919, and became an aviation cadet in 1941. He was later assigned to the 2nd Fighter Squadron, 52nd Fighter Group, in North Africa and Sicily as a fighter pilot flying Spitfires. He scored his first aerial combat victory flying a Spitfire in 1943. The rest of his victories came after the group transitioned to P-51s in 1944. Ohr ended his tour of duty as the squadron's commanding officer.After the war, he returned to college in California. He studied at the University of California, Berkley, and Northwestern Dental School in Chicago. He established a career as a dental surgeon in Chicago.