OSHKOSH, Wis. (AP) -

Experimental Aircraft Association officials are objecting to a $500,000 bill for air traffic control for the association's annual convention in Wisconsin.

The AirVenture convention draws tens of thousands of pilots and aviation enthusiasts to Oshkosh each summer.

The Federal Aviation Administration usually has its controllers staff the tower at Wittman Regional Airport during the show. The influx of planes makes the air traffic control tower the busiest in the world during the duration of the show.

EAA Chairman Jack Pelton tells Oshkosh Northwestern Media that this year, the FAA has demanded $500,000 from the EAA to cover air traffic costs or it won't staff the event. Pelton says EAA can pay the fee but he worries that other air shows hit with similar demands won't be able to.