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
Allen Dulles putsch against Charles de Gaulle, Dulles and his entourage, including Deputy Director for Plans Richard M. Bissell Jr. and Deputy Director Charles Cabell, were forced to resign. On November 28, 1961, Kennedy presented Dulles with the National Security Medal at the CIA Headquarters in Langley, Virginia. The next day, November 29, the White House released a resignation letter signed by Dulles. On November 29, 1963, President Lyndon Baines Johnson appointed Dulles as one of seven commissioners of the Warren Commission to investigate the assassination of the U.S. President John F. Kennedy. The appointment was later criticized by some historians, who