Retired boxing champion Muhammad Ali, center, waves alongside his wife Lonnie Ali, left, and his sister-in-law Marilyn Williams, right, after receiving the Liberty Medal during a ceremony at the National Constitution Center, Thursday, Sept. 13, 2012, in Philadelphia. The honor is given annually to an individual who displays courage and conviction while striving to secure liberty for people worldwide. (AP Photo/Matt Slocum)

Associated Press
Retired boxing champion Muhammad Ali, center, waves alongside his wife Lonnie Ali, left, and his sister-in-law Marilyn Williams, right, after receiving the Liberty Medal during a ceremony at the National Constitution Center, Thursday, Sept. 13, 2012, in Philadelphia. The honor is given annually to an individual who displays courage and conviction while striving to secure liberty for people worldwide. (AP Photo/Matt Slocum)
Retired boxing champion Muhammad Ali, center, waves alongside his wife Lonnie Ali, left, and his sister-in-law Marilyn Williams, right, after receiving the Liberty Medal during a ceremony at the National Constitution Center, Thursday, Sept. 13, 2012, in Philadelphia. The honor is given annually to an individual who displays courage and conviction while striving to secure liberty for people worldwide. (AP Photo/Matt Slocum)
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