The greatest of them all, the man who defined a sport and a nation, died Friday at age 74.
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During an April 4, 1964 visit to Muhammad Ali's Miami training room, the Beatles pretend to be knocked out by the newly crowned Heavyweight Champion of the World.
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Muhammad Ali (born Cassius Marcellus Clay Jr. before his conversion to Islam) met with African-American Muslim minister and activist Malcolm X (born Malcolm Little), after Ali beat Sonny Liston in Miami in March 1964 to claim the world heavyweight championship.
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Referee Joe Walcott restrains heavyweight champion Muhammad Ali as challenger Sonny Liston lies on the canvas after the first round knock down in Lewiston, Maine, May 25, 1965.
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Heavyweight boxing champion Muhammad Ali (L) being cared for by his trainer, Angelo Dundee (R), and an assistant during Ali's defense of the title in a bout against German European Champion Karl Mildenberger at the Waldstadion in Frankfurt on September 10, 1966.
Muhammad Ali talks with Nation of Islam women outside a Southside Muslim Temple in Chicago in 1966.
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Challenger Muhammad Ali is hit with a left jab by defending world champion George Foreman during the WBA/WBC championship bout in Kinshasa, Zaire, on October 30, 1974. Ali regained the heavyweight crown by knocking out Foreman in the eighth round of their fight dubbed 'Rumble in the Jungle.'
World heavyweight champion Muhammad Ali visits Nation of Islam leader Elijah Muhammad in his Chicago home in 1966.
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Heavyweight champion Muhammad Ali knocks challenger Cleveland Williams to the canvas in the third round of a title fight in Houston's Dome Stadium on Novermber 14, 1966.
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American heavyweight boxing champion Muhammad Ali walks through New York City with members of the Black Panther Party in September 1970. Ali was sentenced to five years in prison and his championship title revoked after he was convicted of draft evasion upon his refusal to serve in the American military in Vietnam upon grounds of conscientious objection. The decision was overtuned in 1971, but Ali became a figurehead of resistance.
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Muhammad Ali holds his daughter on his lap as he greets fans at his Deer Lake, Pennsylvania training camp in April 1978.
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Boxing legend Muhammad Ali hugs former U.S. president Bill Clinton on stage, November 19, 2005, during the Grand Opening Gala for the Muhammad Ali Center at the Kentucky Center in Louisville, Kentucky. The Ali Center was designed as a "global gathering place" to promote peace and tolerance, and to inspire people to reach their potential.
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Golf great Arnold Palmer, left, greets boxing legend Muhammad Ali, center, and Miami Heat's Dwyane Wade prior to the coin toss at the Orange Bowl football game between Wake Forest and Louisville Tuesday, Jan. 2, 2007, in Miami.
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