Tegel was developed into west Berlin's principal airport, and by 2007 had been joined by a redeveloped Berlin-Schoenefeld in Brandenburg. As a result of these two airports Tempelhof has been closed, whilst Gatow no longer serves as an airport and now hosts the Museum of the German Luftwaffe. During the 1970s and 1980s Schoenefeld had had its own crossing points through the Berlin Wall for western citizens.