The Biggest Airshow on Earth: EAA Airventure Oshkosh

What is the world's busiest airport control tower come summer time? If you answered Chicago O'Hare, London Heathrow or Beijing International, guess again. The title is owned  by the Wittman Regional Airport in Oshkosh, Wisconsin or simply called Oshkosh.

See, it says so, right on the tower.