Modern history of East Asian martial arts
Taekwondo was developed from karate for use in the Republic of Korea Armed Forces from 1954. For this purpose, karate terminology needed to be "nationalized". The name "taekwondo" is due to shotokan practitioner and army general Choi Hong Hi. After the Korean War, Taekwondo was further developed into a purely sportive discipline, since 1973 overseen by the World Taekwondo Federation. 
During 1964-1966, Choi Hong Hi continued to promote taekwondo, working to put together a world-class exhibition team. Taekwondo's emphasis on jumping and flying kicks dates to this period. While taekwondo was based off karate, the structural changes made in the 1950s and 1960s were significant, and it cannot now be considered a branch of karate, but is a standalone modern martial art. Taekwondo was presented at the Summer Olympics as a demonstration sport in 1988 and 1992, and became an official Olympic discipline in 2000.
Jun Chong
Jun Chong was born in 1944 in South Korea. At the age of eight, he began training in the country's national martial art of Taekwondo. While he won numerous competitions both nationally and internationally, Chong decided to try his hand at train in other forms of martial arts, including Hapkido, Judo, Aikido, and Boxing. Chong is currently a 9th-degree grandmaster in Taekwondo and after emigrating to Los Angeles in the 1970s, he opened his own school, which continues to operate today. He has had his share of celebrity students, including Phillip Rhee, Simon Rhee, Lorenzo Lamas, Sam J. Jones, boxing legend Sugar Ray Leonard, and Heather Graham.