1971 (12 images)

Updated: March 11, 2009 at 2:25 PM
12 of 12
Former world heavyweight champion Cassius Clay (Muhammad Ali) spars with his former sparring partner Jim Ellis at a press conference in Houston's Astrodome June 21, 1971. The two will meet in the ring in the Astrodome on July 26. (UPI Photo/Files)
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