This man headed the Independent Commission on International Development Issues, which released the North-South report often named for him.  He flew to Iraq to arrange the release of western hostages in 1990, and he had to resign his most famous post when his aid Gunther Guillaume was revealed to be a spy.  He recognized the Oder-Neisse Line in a nonaggression treaty with Poland.  The longtime leader of the Social Democrats, this man served as mayor of West Berlin and was known for his policy of Ostpolitik. For 10 points, name this winner of the 1971 Nobel Peace Prize, 
This man headed the Independent Commission on International Development Issues, which released the North-South report often named for him.  He flew to Iraq to arrange the release of western hostages in 1990, and he had to resign his most famous post when his aid Gunther Guillaume was revealed to be a spy.  He recognized the Oder-Neisse Line in a nonaggression treaty with Poland.  The longtime leader of the Social Democrats, this man served as mayor of West Berlin and was known for his policy of Ostpolitik. For 10 points, name this winner of the 1971 Nobel Peace Prize, the Chancellor of West Germany from 1969 to 1974.
This man headed the Independent Commission on International Development Issues, which released the North-South report often named for him.  
Willy Brandt [or Herbert Ernst Karl Frahm]