EAA AirVenture Oshkosh (formerly The EAA Annual Convention and Fly-In) is an annual gathering of aviation enthusiasts held each summer at Wittman Regional Airport in Oshkosh, Wisconsin, United States. Sponsored by the Experimental Aircraft Association (EAA), an international organization based in Oshkosh, the airshow is the largest of its kind in the country. The show lasts a week, typically beginning on the last Monday in July. During the gathering, the airport's control tower is the busiest control tower in the world . The next gathering is scheduled for July 28-August 3, 2014. - Source: Wikipedia