Park Dong-keun

Park Dong-keun (; born ''c.'' 1941), also known as D. K. Park, is a South Korean Grandmaster of taekwondo. He holds the title "Grandmaster," the rank of 9th ''dan'' in taekwondo, and was Korea's only undefeated taekwondo fighter in more than 200 International championship competition. Park introduced the martial art of taekwondo to Thailand in 1966, before settling in the United States of America, and was the taekwondo coach of both the US National Team and the US Olympic Team. Provided by Wikipedia