Berlin Tegel Airport continued operating its daily non-stop Tegel–JFK service until Delta Air Lines assumed most of Pan Am's transatlantic scheduled services during 1991. Pan Am Express, which was not included in Pan Am's IGS sale to Lufthansa, continued operating all of its domestic and international regional scheduled routes from Tegel as an independent legal entity until its acquisition by TWA in 1991. Following TWA's takeover of Pan Am Express, the former Pan Am Express Berlin operations were closed. Until December 1994, Lufthansa also contracted Euroberlin to operate some of its internal German flights from its new Tegel base, making use of that
Airport city other food services; specialty retail and factory outlet centres; cultural and entertainment attractions; hotels; banks and currency exchanges; business offices and complexes; convention and exhibition centres; leisure, recreation and fitness venues; logistics and distribution; perishables and cold storage; and free trade zones and customs-free zones. Airport cities may be found in varying stages of development surrounding major airports worldwide, particularly in Europe, where older airports are being redeveloped or expanded on large tracts of unused airport land. Many new airports in Asia are being planned as airport cities or aerotropolises. North America, South America, and Africa all boast airport city