- He started learning taekwondo in his teens in Seoul. During the Korean War, he was an interpreter for the U.S. Air Force. Eventually he was drafted into the South Korean army.
- He was a grandmaster of taekwondo who helped to popularize it in the US. He began teaching classes in 1956 in Texas as part of a military training program. In 1962 he opened a gym in Washington DC, where his students included members of Congress.
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