The strange case of O'Hare Airport's vanishing Terminal 4

Chicago's O'Hare Airport is one of the busiest in the world. That scene from Home Alone where they're running through the airport is no joke. O'Hare's hectic energy is overwhelming enough to make you forget your own Macaulay Culkin, for sure. And if the McCallisters had followed signs for Terminal 4, they would've never even boarded the plane. Terminal 4 doesn't exist.