Checkpoint Charlie (or "Checkpoint C") was the name given by the Western Allies to the best-known Berlin Wall crossing point between East Berlin and West Berlin during the Cold War (1947–1991).
East German leader Walter Ulbricht agitated and maneuvered to get the Soviet Union's permission to construct the Berlin Wall in 1961 to stop Eastern Bloc emigration and defection westward through the Soviet border system, preventing escape across the city sector border from communist East Berlin into West Berlin. Checkpoint Charlie became a symbol of the Cold War, representing the separation of East and West. Soviet and American tanks briefly faced each other at the location during the Berlin Crisis of 1961.
Nathaniel Brown was the military police officer in charge on duty the night of 9 November 1989. He was relieved at 0600, 10 November 1989 by Michael Rafferty. They were two of the 4 rotating MP NCOIC (Non Commissioned Officer in Charge) of Allied Checkpoint Charlie.
After the dissolution of the Eastern Bloc and the reunification of Germany, the building at Checkpoint Charlie became a tourist attraction. It is now located in the Allied Museum in the Dahlem neighborhood of Berlin (Quelle: http://en.wikipedia.org/wiki/Checkpoint_Charlie