It was supposed to be the world’s largest airport, a glamorous intercontinental hub for supersonic airliners with six runways and high-speed rail links to surrounding cities. But today, it’s little more than an airstrip in the middle of nowhere.It was supposed to be the world’s largest airport, a glamorous intercontinental hub for supersonic airliners with six runways and high-speed rail links to surrounding cities. But today, it’s little more than an airstrip in the middle of nowhere.