Heavyweight champion Muhammad Ali stands over fallen challenger Sonny Liston, shouting after knocking him down with a short, hard right to the jaw during their bout in Lewiston, Maine, on May 25, 1965. (John Rooney / Associated Press)
A look at the life and career of boxing legend Muhammad Ali.
Muhammad Ali trains in London in 1966. (Wesley / Getty Images)
Heavyweight champion Sonny Liston, left, and Muhammad Ali exchange punches during their first fight in Miami on Feb. 25, 1964. Ali, then known as Cassius Clay, defeated Liston by technical knockout in the seventh round to claim the title. (Hulton Deutsch / Allsport)
Muhammad Ali, right, punches George Foreman in the head during their heavyweight title bout in Zaire on Oct. 30, 1974. (Ed Kolenovsky / Associated Press)
Muhammad Ali watches as the flame climbs up to the Olympic torch while taking part in the opening ceremonies of the 1996 Atlanta Olympic Games. (Doug Mills / Associated Press)
