Reuters Pictures
Former Soviet Union leader Mikhail Gorbachev, former Solidarnocz (solidarity) trade union leader and former Polish President Lech Walesa and former South African President Frederik Willem de Klerk (R-L) applaud following the opening speech of Berlin Mayor Klaus Wowereit (not in picture) at the beginning of the 10th World Summit of Nobel Peace Laureates in Berlin November 10, 2009.