German President Horst Koehler (C) waves as he and heads of states arrive at the Brandenburg Gate in Berlin November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall. Pictured are (L-R) British Prime Minister Gordon Brown, French President Nicolas Sarkozy, German Chancellor Angela Merkel, Russian President Dmitry Medvedev, Horst Koehler, Berlin Mayor Klaus Wowereit, U.S. State Secretary Hillary Clinton, Romanian President Traian Basescu and Finnish President Tarja Halonen. Reuters Pictures 3 weeks ago

German President Horst Koehler (C) waves as he and heads of states arrive at the Brandenburg Gate in Berlin November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall. Pictured are (L-R) British Prime Minister Gordon Brown, French President Nicolas Sarkozy, German Chancellor Angela Merkel, Russian President Dmitry Medvedev, Horst Koehler, Berlin Mayor Klaus Wowereit, U.S. State Secretary Hillary Clinton, Romanian President Traian Basescu and Finnish President Tarja Halonen.