U.S. International Transportation Exposition, better known as Transpo '72, was a trade show held on of land at Dulles International Airport outside Washington, D.C., for nine days from May 27 to June 4, 1972. The $10 million event, sponsored by the U.S. Department of Transportation, was a showcase for all sorts of transportation-related technologies. Over a million visitors flocked to the show from all over the world. According to the "Wall Street Journal", it was "the biggest show the government has put on since World War II."