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 Foster Dulles the preamble to the United Nations Charter and served as a delegate to the United Nations General Assembly. In 1949, Dewey appointed Dulles to fill the Senate vacancy caused by the resignation of Sen. Robert F. Wagner. He served for four months but left office after being defeated in a special election by Herbert H. Lehman. After Eisenhower won the 1952 presidential election, he chose Dulles as Secretary of State. As Secretary of State, Dulles concentrated on building and strengthening Cold War alliances, most prominently the North Atlantic Treaty Organization. He was the architect of the Southeast Asia Treaty Organization,