Baltimore/Washington International Thurgood Marshall Airport is an international airport serving the Baltimore-Washington Metropolitan Area in the United States. It is commonly called BWI, BWI Airport or BWI Marshall, BWI being an initialism for "Baltimore/Washington International" and the facility's IATA Airport Code. The airport is located in northern unincorporated Anne Arundel County, about 10 miles (16 km) south of Baltimore and 30 miles (48 km) northeast of Washington, D.C. It is adjacent to the Linthicum CDP. It is named after Thurgood Marshall, a Baltimore native and the first African American to serve on the Supreme Court of the United States. BWI is a secondary hub for AirTran Airways and a focus city for Southwest Airlines and Cape Air. A record 21.9 million passengers traveled through BWI in 2010, an increase of 4.7% over the previous year, This makes BWI the 24th busiest airport in North America. In 2010, BWI was ranked as the best airport of its size (15-25 mil. passengers) in the world by the Airports Council International based on its 2009 Airport Service Quality survey. In 2010, BWI was ranked the second airport in North America by Airports Council International - North America for "Best Food and Beverage Program."