Passenger airliners are a mainstay of the aircraft business, and the world's two biggest manufacturers are trying to outdo each other with supermassive craft.
At more than 70 meters -- 229 feet -- long, Boeing's 747-8 and Airbus's A380 can carry hundreds of passengers at once. But these behemoths need specialized facilities for loading, unloading and maintenance.
Only about 15 airports in the United States can service these particularly large airliners, and the associated hangars are owned by airlines. However, Rockford is about to become an exception.