Son Duk-sung

Son Duk-sung (; June 17, 1922 – March 29, 2011) was a martial artist, Grand Master and ninth-degree black belt, co-founder of the Korean martial art of taekwondo, successor of Lee Won-kuk and leader of the Chung Do Kwan school (1950–59). He was also the chief Instructor of the South Korean Army and the 8th U.S. Army, founder and president of the World Taekwondo Association and author of the books "Korean Karate, the Art of Tae Kwon Do” and “Black Belt Korean Karate." Provided by Wikipedia