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
Missouri City, Texas City is served by Fort Bend Independent School District, while the Harris County portion is served by Houston Independent School District. The Harris County portion is within Trustee District IX, represented by Lawrence Marshall as of 2008. FBISD formed in 1959 by the consolidation of Missouri City Independent School District and the Sugar Land Independent School District. It operates the following schools within the Missouri City city limits: In addition to these schools, a small portion of Missouri City is also served by Dulles Middle School, First Colony Middle School, Clements High School and Dulles High School, all in Sugar