Dulles International Airport is located 26 miles outside of Washington D.C. in Virginia. It opened to the public in 1962, but was not considered a major airport until the 1970s, during the age of jumbo jets. The main terminal was designed to suggest graceful beauty, much like flight. In addition to designing a modern building, Saarinen created mobile lounges, that served as waiting areas that also bused people to their flights. The modernist design features concrete, glass, and steel. The shape of the roof curves up like a wing in flight.