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BERLIN - SEPTEMBER 09: A boundary-post of the German Democratic Republic (GDR) is seen near Checkpoint Charlie on September 9, 2009 in Berlin, Germany. Allied and Soviet soldiers once faced each other at Checkpoint Charlie, one of the crossing points between East and West Berlin during the Cold War, when Berlin was divided into zones of occupation. Berlin will celebrate 20 years since the fall of the Berlin Wall this November. (Photo by Andreas Rentz/Getty Images)

BERLIN - SEPTEMBER 09:  A boundary-post of the German Democratic Republic (GDR) is seen near Checkpoint Charlie on September 9, 2009 in Berlin, Germany. Allied and Soviet soldiers once faced each other at Checkpoint Charlie, one of the crossing points between East and West Berlin during the Cold War, when Berlin was divided into zones of occupation. Berlin will celebrate 20 years since the fall of the Berlin Wall this November.  (Photo by Andreas Rentz/Getty Images)