Johnson plans Seoul return with anti-drugs message

(Reuters) - Disgraced Canadian sprinter Ben Johnson will return to Seoul later this month in an anti-doping ambassadorial role, exactly 25 years after his infamous 100m Olympic run in the South Korean capital.

Johnson won gold in a world record time of 9.79 seconds but was stripped of his victory three days later after steroids were detected in his system, in what remains one of sport's most high-profile doping cases.