Former president the Soviet Union Mikhail Gorbachev (R) speaks with former Polish president Lech Walesa 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 1 week ago

Former president the Soviet Union Mikhail Gorbachev (R) speaks with former Polish president Lech Walesa 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.