Nathan Bilow/Getty ImagesRoss Rebagliati was a competitor in the Nagano Winter Olympics 1998 and won the gold medal for Canada at the men's giant-slalom competition. He was tested positive for THC and they disqualified him. THC is not a banned substance. The Canadian Olympic Association decided that the IOC was not authorized to remove the medal for this reason and had to return it. Two months later, they added cannabis to their banned substances list.
