A look back at Muhammad Ali's childhood and early boxing career as Cassius Clay, culminating in his ascension to heavyweight champion, his conversion to Islam, and his epic first fight with Joe Frazier.
Ali regains the title and avenges his defeat to Frazier, leading to 1974's "Rumble in the Jungle" with Foreman in Zaire. Against all odds, Ali KOs an exhausted Foreman to regain the heavyweight title, and becomes an idol around the world. Another epic victory over Frazier, 1975's "Thrilla in Manilla," follows, but the toll of so many brutal fights starts to show.
