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BERLIN - NOVEMBER 09: German Chancellor Angela Merkel (R) and U.S Secretary of State Hillary Clinton arrive to give statements to the media at the Chancellery on November 9, 2009 in Berlin, Germany. Clinton is in Berlin to participate in celebrations marking the 20th anniversary of the fall of the Berlin Wall, which led to the end of communist rule in East Germany and the reunification of East and West Germany later on. (Photo by Sean Gallup/Getty Images)

BERLIN - NOVEMBER 09:  German Chancellor Angela Merkel (R) and U.S Secretary of State Hillary Clinton arrive to give statements to the media at the Chancellery on November 9, 2009 in Berlin, Germany. Clinton is in Berlin to participate in celebrations marking the 20th anniversary of the fall of the Berlin Wall, which led to the end of communist rule in East Germany and the reunification of East and West Germany later on.  (Photo by Sean Gallup/Getty Images)