After the evacuation of the TRACON facility, six controllers who work at the facility drove to Aurora, where the FAA operates Chicago Center, a radar facility that normally handles planes at high altitude that are traversing the Chicago-area airspace en route elsewhere, said Doug Church, a union spokesman for the National Air Traffic Controllers Association. The six controllers handled some of the first planes taking to the air and arriving in the Chicago area after being diverted to other airports, Church said.