The Olympic Games is a major international multi-sport event. During its history, both the Summer and Winter Games were a subject of many scandals, controversies, and illegal drug uses. Some states have boycotted the Games on various occasions, often as a sign of protest against the International Olympic Committee, often having racial discrimination or contemporary politics of other participants. After both World Wars, the losing countries were not invited. Other controversies include doping programs, decisions by referees and even gestures made by athletes.