The Olympic Games is a major international multi-sport event. During its history, both the Summer and Winter Games have been a subject of scandals and controversies, including the use of performance enhancing drugs.
Some countries have boycotted the Games on various occasions, either as a protest against the International Olympic Committee or to protest racial discrimination in or the contemporary politics of other participants. After both World Wars, the defeated countries were not invited. Other controversies include doping programs, decisions by referees and gestures made by athletes.