(From L) British Prime Minister Gordon Brown, French President Nicolas Sarkozy, German Chancellor Angela Merkel, Russian President Dmitry Medvedev, German President Horst Koehler, Berlin Mayor Klaus Wowereit and US Secretary of State Hillary Clinton walk through the Brandenburg Gate in Berlin on November 9, 2009 during the celebrations marking the 20th anniversary of the fall of the Berlin Wall. Getty Images logo Getty Images 27 months ago

(From L) British Prime Minister Gordon Brown, French President Nicolas Sarkozy, German Chancellor Angela Merkel, Russian President Dmitry Medvedev, German President Horst Koehler, Berlin Mayor Klaus Wowereit and US Secretary of State Hillary Clinton walk through the Brandenburg Gate in Berlin on November 9, 2009 during the celebrations marking the 20th anniversary of the fall of the Berlin Wall.