Former South African president F.W. de Klerk listens to the speeches at the 10th World Summit of Nobel Peace Laureates at the Rotes Rathaus (City Hall) in Berlin, on November 10, 2009. The two-day summit is attended by 22 Nobel Peace Laureates. Getty Images logo Getty Images 27 months ago

Former South African president F.W. de Klerk listens to the speeches at the 10th World Summit of Nobel Peace Laureates at the Rotes Rathaus (City Hall) in Berlin, on November 10, 2009. The two-day summit is attended by 22 Nobel Peace Laureates.