Born Carlos Ray Norris, Chuck Norris served in Korea in the Army. While there, he studied karate and later became the World Middleweight Karate Champion. He was encouraged by one of his karate students, actor Steve McQueen, to go into acting. He debuted onscreen in the enormously popular Bruce Lee vehicle Enter the Dragon (1973); since the death of Lee he has been the screen's premier martial arts star. He has appeared primarily in militaristic movies in which he single-handedly kills many enemies. His breakthrough film was Missing in Action (1984), in which he played an ex-POW in search of American prisoners still held in Vietnam.