The Port Authority of New York and New Jersey operates many of the busiest and most important transportation links in the bi-state region. They include the George Washington Bridge and Bus Station; the Lincoln and Holland tunnels; the Goethals and Bayonne bridges; the Outerbridge Crossing; the Port Authority Bus Terminal in midtown Manhattan; John F. Kennedy International, Newark Liberty International, LaGuardia, Stewart International and Teterboro airports; AirTrain JFK and AirTrain Newark; the PATH (Port Authority Trans-Hudson) rapid-transit system; Port Newark; the Elizabeth-Port Authority Marine Terminal; the Howland Hook Marine Terminal on Staten Island; the Brooklyn Piers/Red Hook Container Terminal; and the Port Authority-Port Jersey Marine Terminal. The agency also owns the 16-acre World Trade Center site in Lower Manhattan. The Port Authority is financially self-sufficient and does not receive tax dollars from either state.