Ali and Fox testified on funding for research on Parkinson 's disease .
Former heavyweight champ Muhammad Ali delivers a gentle right to the chin of actor Michael J. Fox at a Senate health and labor subcommittee hearing in Washington on May 22 , 2002 .
heavyweight champ and Fox testified on funding for research on Parkinson 's disease .
Former heavyweight champ Muhammad Ali delivers a gentle right to the chin of actor Michael J. Fox at a Senate health and labor subcommittee hearing in Washington on May 22 , 2002 .