Muhammad Ali captured the imagination of the world with his Olympic gold medal victory in Rome as Cassius Clay and his stunning upset victory over Sonny Liston to take the world heavyweight championship. He summed up boxing strategy with the delicious phrase "float like a butterfly, sting like a bee." With his conversion to the Nation of Islam, his outspoken opposition to racism and the Vietnam War, Ali endured vilification and risked his career for his beliefs in the turbulent late 1960s. He was stripped of his title when he refused induction into the armed services in 1967 and was unable to fight until the U.S. Supreme Court upheld his draft appeal. Returning to the ring in 1970, Ali went on to compile a 56-5 record, wage furious ring battles with Joe Frazier and George Foreman that were among boxing's greatest events and became the only man ever to win the heavyweight crown three times. Magnum photographers have produced major photographic essays on Ali over the course of his entire career.