Washington Dulles International Airport (IAD), which is located around 26 miles west of Washington D.C., is one of the three major airports that serve the capital metropolitan area, alongside Reagan National Airport (DCA) and Baltimore/Washington International Airport (BWI). The facility was opened back in 1962 and was named after former US Secretary of State John Foster Dulles. The facility is known for the architecture of its main terminal building and spans an impressive 13,000 acres, making it the fourth-largest such facility in the United States by land area.