Berlin Blockade
The three major Berlin airfields involved were Tempelhof, in the American Sector, RAF Gatow in the British and Tegel in the French. To keep everything safe, air traffic control was located at Tempelhof. A new four-power organization also started, Berlin Air Safety Center (BASC). BASC only closed down in 1990, when Germany was reunited and the ordinary German civilian air traffic control took over.