Muhammad Ali

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Muhammad Ali playfully spars with a photographer while on a tour bus to visit Alain Leroy Locke High School, Tuesday, December 3, 1996, in South-Central Los Angeles. Ali visited two high schools and the Watts Labor Community Action Committee to promote his new book, "HEALING: A Journal of Tolerance and Understanding," with co-author Thomas Hauser. (AP Photo/Nick Ut)

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Aging challenger Muhammad Ali, left, is shown being pummeled against the ropes by WBC heavyweight champion Larry Holmes during their Las Vegas, Nevada fight of October 2, 1980. Holmes scored an uneventful eleventh round technical knockout over Ali to retain his WBC heavyweight title. (AP Photo/stf)

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Heavyweight boxing champion Muhammad Ali and his bride, Veronica Porsche, pose for photographers, June 19, 1977, following their wedding in Los Angeles. It was the third marriage for Ali. (AP Photo/stf)

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**FILE** Spray flies from the head of challenger Joe Frazier, left, as heavyweight champion Muhammad Ali connects with a right in the ninth round of their title fight in Manila, Philippines, Oct. 1, 1975. Ali won the fight on a decision to retain the title. (AP Photo/Mitsunori Chigita, File)

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FILE - In this Oct. 30, 1974 file photo, referee Zack Clayton, right, steps in after challenger Muhammad Ali looks on after knocking down defending heavyweight champion George Foreman in the eighth round of their championship bout in Kinshasa, Zaire. Ali regained the world heavyweight crown by knockout in the eighth round of the fight dubbed "Rumble in the Jungle." (AP Photo/File)

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Heavyweight contender Muhammad Ali plays the bongos with "Big Black" at a gym in the N'Sele training center in Zaire, Oct. 5, 1974. Ali is training for a bout with George Foreman. (AP Photo/Horst Faas)

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Muhammad Ali, former world heavyweight boxing champion, toys with the finely combed hair of television sports commentators Howard Cosell before the start of the Olympic boxing trials, Aug. 7, 1972, in West Point, NY. (AP Photo)

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** FILE **Heavyweight boxer Muhammad Ali makes a point during a news conference that he conducts from inside the ring in Atlanta, Ga., in this Oct. 24, 1970, file photo. A new book, "Ali Rap: Muhammad Ali the First Heavyweight Champion of Rap," proclaims Ali's verbal barrage was more than self-promotion, but sowed the seeds of hip-hop, which came into being in the `70s. (AP Photo/FILE)

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Speaking at a press conference in Chicago, Friday, Sept. 25, 1970, deposed world heavyweight champion Muhammad Ali "Cassius Clay" aid he might fight Jerry Quarry in New York if Georgia Gov. Lester Maddox succeeds in halting the scheduled Atlanta bout. (AP Photo/Charles Kolenovsky)