Muhammad Ali

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World heavyweight champion Muhammad Ali sits in his room on his arrival in Houston, Feb. 20, 1967. The champ was silent on his thoughts about his draft status referring all questions to his New York attorney. The Houston Selective Service appeals board refused his appeal for a deferment. He was trying for a deferment on grounds that he is a Muslim minister. Ali starts training tomorrow for his title defense against Zora Folley on March 22 in New York. (AP Photo/Ed Kolenovsky)

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Muhammad Ali gets his gloves laced outside a boxing ring in Houston, Texas in February 1967. Ali is training for a Feb. 6 championship title fight with Ernie Terrell. (AP Photo)

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Muhammad Ali applauds during a marathon speech given by Elijah Muhammad at convention of the Nation of Islam sect, Feb. 27, 1966 in Chicago. (AP Photo/Paul Cannon)

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While Illinois Athletic Commission listened, heavyweight champion Muhammad Ali speaks, Feb. 25, 1966 in Chicago. He attended commission meeting as a result of Illinois Gov. Otto Kerner?s request that the commission members reconsider permission for Clay to defend title later this month. Ali had criticized his imminent army draft. (AP Photo)

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Heavyweight champion Muhammad Ali stands over fallen challenger Sonny Liston, shouting and gesturing shortly after dropping Liston with a short hard right to the jaw on May 25, 1965, in Lewiston, Maine. The bout lasted only one minute into the first round. Ali is the only man ever to win the world heavyweight boxing championship three times. He also won a gold medal in the light-heavyweight division at the 1960 Summer Olympic Games in Rome as a member of the U.S. Olympic boxing team. In 1964 he dropped the name Cassius Clay and adopted the Muslim name Muhammad Ali. (AP Photo/John Rooney)

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World Heavyweight Boxing Champion, Muhammad Ali, right, is shown with Black Muslim Leader, Malcolm X, outside the Trans-Lux Newsreel Theater on Broadway at 49th Street, New York City, March 1, 1964. They had just watched a screening of films on Ali's title fight with Sonny Liston in Miami Beach, Feb. 25. (AP Photo)

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FILE - In this Feb. 18, 1964, file photo, The Beatles, from left, Paul McCartney, John Lennon, Ringo Starr, and George Harrison, take a fake blow from Cassius Clay, who later changed his name to Muhammad Ali, while visiting the heavyweight contender at his training camp in Miami Beach, Fla. Ali turns 70 on Jan. 17, 2012. (AP Photo/File)

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FILE - In this Feb. 8, 1962, file photo, a young Muhammad Ali, left, stands with his trainer Angelo Dundee at City Parks Gym in New York. Dundee, the trainer who helped groom Ali and Sugar Ray Leonard into world champions and became one of boxing's most recognizable figures, died Wednesday, Feb. 1, 2012. He was 90. (AP Photo/Dan Grossi, File)

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FILE - In this Nov. 9, 2005 file photo, President Bush presents the Presidential Medal of Freedom to boxer Muhammad Ali in the East Room of the White House. He is now so much a part of the nation's social fabric that it's hard to comprehend a time when Ali was more reviled than revered. (AP Photo/Evan Vucci, File)

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American Boxer Muhammad Ali 1972

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David Frost's volumes of interviews from notables such as the Beatles, Maria Callas, Muhammad Ali and Vladimir Putin contain a wealth of history.

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FILE - In this Jan. 2, 2013, file photo, former boxing legend Muhammad Ali arrives at the Sugar Bowl football game in New Orleans. Muhammad Ali's daughter knocked down rumors of her father being near death Sunday, Feb. 3, 2013, saying he was at home watching NFL football's Super Bowl. (AP Photo/Dave Martin, File)

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FILE - Former heavyweight boxing champion Muhammad Ali displays his signature boxing pose after honoring outstanding surgeons and physicians at St. Joseph's Hospital Barrow Neurological Institute, in this Feb. 22, 2012 file photo taken in Phoenix. Retired boxing champion Muhammad Ali will be awarded the medal on Thursday Sept. 13, 2012 at a ceremony at the National Constitution Center in Philadelphia. The honor is given annually to an individual who displays courage and conviction while striving to secure liberty for people worldwide. It comes with a $100,000 cash prize. (AP Photo/Ross D. Franklin, File)