Does any one know the taekwondo fighter (who has been retired for quite some time) who won the world martial arts championship 11 times and remained undefeated...any ways he's a good example of..Its not the art but the person who makes the fighter...I forgot his name but he is supposed to be a big hero in Korea?

i'im not completely sure but i think it might be my friends teacher out in a chicago suburb, from what he's told me, there calling him back to korea to defend his TKD title.