Begun in 1953, the AirVenture has grown to become one of the largest conventions of any kind in the world. Sponsored by the Experimental Aircraft Association, the annual event draws together enthusiasts, designers, and a host of individuals, companies, and government agencies involved in the aviation and aeronautics industries. Some 10,000 aircraft of all kinds are on display at the convention. In the afternoon, there is a three-hour air show; in the evening, live entertainment performances feature NASA astronauts, test pilots, and leading aviation personalities.
Source: The Free Dictionary