British Prime Minister Gordon Brown, French President Nicolas Sarkozy, German Chancellor Angela Merkel, Russian President Dmitry Medvedev, German President Horst Koehler and Berlin Mayor Klaus Wowereit  (L-R) arrive at Pariser Platz in Berlin November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall. Reuters Pictures logo Reuters Pictures 27 months ago

British Prime Minister Gordon Brown, French President Nicolas Sarkozy, German Chancellor Angela Merkel, Russian President Dmitry Medvedev, German President Horst Koehler and Berlin Mayor Klaus Wowereit (L-R) arrive at Pariser Platz in Berlin November 9, 2009, during celebrations to mark the 20th anniversary of the fall of the Berlin Wall.