The Olympic Games (French: les Jeux olympiques) (JO), is a major international event featuring summer and winter sports, in which thousands of athletes participate in a variety of competitions. The Olympic Games have come to be regarded as the world’s foremost sports competition where more than 200 nations participate. The Games are currently held every two years, with Summer and Winter Olympic Games alternating, although they occur every four years within their respective seasonal games. Originally, the ancient Olympic Games were held in Olympia, Greece, from the 8th century BC to the 4th century AD. Baron Pierre de Coubertin founded the International Olympic Committee (IOC) in 1894. The IOC has since become the governing body of the Olympic Movement, whose structure and actions are defined by the Olympic Charter.
The evolution of the Olympic Movement during the 20th and 21st centuries has resulted in several changes to the Olympic Games. Some of these adjustments include the creation of the Winter Games for ice and winter sports, the Paralympic Games for athletes with a physical disability, and the Youth Olympic Games for teenage athletes. The IOC has had to adapt to the varying economic, political, and technological realities of the 20th century. As a result, the Olympics shifted away from pure amateurism, as envisioned by Coubertin, to allow participation of professional athletes. The growing importance of the mass media created the issue of corporate sponsorship and commercialization of the Games. World Wars led to the cancellation of the 1916, 1940, and 1944 Games. Large boycotts during the Cold War limited participation in the 1980 and 1984 Games.
The Munich massacre is an informal name for events that occurred during the 1972 Summer Olympics in Munich, Bavaria in southern West Germany, when members of the Israeli Olympic team were taken hostage and eventually killed by the Palestinian group Black September. Shortly after the crisis began, the Palestinians demanded the release of 234 prisoners held in Israeli jails. Black September called the operation "Ikrit and Biram", after two Christian Palestinian villages whose inhabitants were expelled by the Haganah in 1948.
By the end of the ordeals, the kidnappers had killed eleven Israeli athletes and coaches and a West German police officer. Five of the eight members of Black September were killed by police officers during a failed rescue attempt. The three surviving assassins were captured, but later released by West Germany following the hijacking by Black September of a Lufthansa airliner. Israel responded to the killings with Operation Spring of Youth and Operation Wrath of God, during which Palestinians suspected of involvement in the massacre were systematically tracked down and killed by Israeli intelligence and special forces. The Israeli operations cost the lives of one innocent in Norway (Lillehammer affair) and of four passersby in Lebanon during the killing of Ali Hassan Salameh.