** FILE ** Retired boxing champion Muhammad Ali, center, stands alongside his daughter, Laila Ali, left, wife Lonnie Ali, 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 Rourke)

Photo by: Matt Rourke

** FILE ** Retired boxing champion Muhammad Ali, center, stands alongside his daughter, Laila Ali, left, wife Lonnie Ali, 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 Rourke)