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
Eleanor Lansing Dulles Watson Foster, served as United States Secretary of State under President Benjamin Harrison, for eight months. Her mother's sister married Robert Lansing, Secretary of State under President Woodrow Wilson. Her oldest brother, John Foster Dulles, was Secretary of State under President Dwight D. Eisenhower. Her brother Allen Dulles served as Director of the Central Intelligence Agency from 1953 to 1961. She had two sisters as well. Her nephew Avery Dulles was a cardinal of the Roman Catholic Church. Eleanor Lansing Dulles married Professor David Simon Blondheim (1884–1934) on December 6, 1932. Blondheim had been a Medieval Studies fellow of the