There are two international sports federations that Olympic Game organizer, the IOC cannot ignore. One is the International Association of Athletics Federations (IAAF) which organizes the World Athletics Championships, the other is International Football Federation which hosts the football World Cup (FIFA).
As World Athletics Championships was held in each country since 1800, 17 countries established international Association of Athletics Federations (IAAF) in order to manage event program, standardization of equipments and records. Since Athens Olympics 1896, athletics was adopted as an official event and also never been omitted. Football made debut in Paris Olympics 1900, but was not held in LA Olympics 1932.
Since the 1980s, spread of TV supply and relay broadcasting of sports were increased it was considered that it would be possible found World Championships with an single event relying on the support of TV rights and sponsorships. After this notification the first IAAF World Championships were held in Helsinki 1983.
The World Athletics Championships emerged as one of the world's three sporting events, along with World cup and Olympic Games. The World Championships in athletics will be held in Daegu on 27th Aug 2011.