Washington Dulles International Airport passengers. Dulles was once assigned the airport code DIA, with each letter corresponding to the initials of Dulles International Airport. However, when handwritten, it was often misread as DCA, the code for nearby Ronald Reagan Washington National Airport. It was later revised to IAD to avoid confusion. The airport's terminal complex consists of a main terminal and two midfield terminal buildings: Concourses A/B and C/D. The entire terminal complex has 123 gates and 16 hardstand locations from which passengers can board or disembark using the airport's plane mate vehicles. Conceived in early planning sessions in 1959, Dulles is one of
John Welsh Dulles John Welsh Dulles John Welsh Dulles (November 4, 1823 – April; 13, 1887) was an American Presbyterian minister and author. He was the grandfather of John Foster Dulles and Allen Welsh Dulles. Dulles was born in Philadelphia, Pennsylvania, November 4, 1823, the son of Joseph Heatly Dulles and Margaret (Welsh) Dulles. He graduated from Yale College in 1844. After pursuing the study of medicine in the University of Pennsylvania in 1844 and 1845, he entered the Union Theological Seminary, New York City, in January, 1846, and completed the course there in 1848. On October 2, 1848, he was ordained by