Chicago is served by Midway International Airport on the south side and O Hare International Airport, the worlds second busiest airport, on the far northwest side. In 2005, O Hare was the worlds busiest airport by aircraft movements and the second busiest by total passenger traffic (due to government enforced flight caps). Both OHare and Midway are owned and operated by the City of Chicago. Gary/Chicago International Airport, located in nearby Gary, Indiana, serves as the third Chicago area airport. Chicago Rockford International Airport, formerly Greater Rockford Airport, serves as a regional base for United Parcel Service cargo flights, some passenger flights, and occasionally as a reliever to OHare, usually in times of bad weather. Chicago is the world headquarters for United Airlines, the worlds second-largest airline by revenue-passenger-kilometers and the city is the second largest hub for American Airlines. Midway airport serves as a major focus city for Southwest Airlines, the worlds largest low-cost airline. A small airport, Meigs Field, was located on the Lake Michigan waterfront adjacent to Grant Park and downtown. There were long-term scheduled flights to Springfield as well as some service to other cities. At 1:30 a.m. on March 31, 2003, the airport runways were unexpectedly destroyed by order of the Mayor, who had sought closure of the airport and development of a nature preserve and bandshell. This resulted in a fine to the city by the Federal Aviation Administration for closure of the airport without sufficient notice, but the airport was eventually demolished.