Doping at the Olympic Games following year's Games. In a few cases the IOC has reversed earlier rulings that stripped athletes of medals. In the case of Rick DeMont, the United States Olympic Committee (USOC) has recognized his gold medal performance in the 1972 Summer Olympics in 2001, but only the IOC has the power to restore his medal, and it has as of 2017 refused to do so. Though no athletes were caught doping at the 1980 Summer Olympics, it has been claimed that athletes had begun using testosterone and other drugs for which tests had not been yet developed. A 1989 report by
Mario & Sonic at the London 2012 Olympic Games introduces new cooperative mechanics and a Party mode. The 3DS version has 57 Olympic-based events in single-player and multiplayer. It also contains an exclusive "Story Mode" which entails the characters from Mario and Sonic's worlds working against the antagonists, who are trying to use fog machines to prevent the games from being held. The first game in the series, "Mario & Sonic at the Olympic Games", is the first official crossover title to feature characters from both Mario and Sonic the Hedgehog's respective franchises. The Olympic Games were chosen as a setting since Sega and Nintendo felt its competitive sportsmanship