Northern Virginia from the older National Airport (a focus city for American Airlines) are restricted for distance, frequency, and flight paths due to the proximity to federal facilities, Dulles is the region's second busiest airport in both passenger loadings and aircraft movements, and the sixteenth-busiest airport in the United States by takeoffs and landings in 2007. Dulles is the region's primary international gateway, serves as a hub for United Airlines, and has recently improved its low-cost carrier offerings with the addition of multiple flights by Southwest and JetBlue. Commuters are served by the Washington Metro subway and the Virginia Railway Express, a
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,