Retired American boxer and three-time World Heavyweight Champion, who is widely considered one of the greatest heavyweight championship boxers of all time. As an amateur, he won a gold medal in the light heavyweight division at the 1960 Summer Olympics in Rome. After turning professional, he went on to become the first boxer to win the lineal heavyweight championship 3 times. Originally known as Cassius Clay, Ali changed his name after joining the Nation of Islam in 1964. In 1967, Ali refused to be inducted into the U.S. military based on his religious beliefs and opposition to the Vietnam War. He was arrested and found guilty on draft evasion charges, stripped of his boxing title, and his boxing license was suspended. He did not fight again for nearly 4 years till his appeal was heard in the U.S. Supreme Court, where it was successful.