A visitor looks at photographs by German photographer Konrad R. Mueller, during a press preview of his exhibition 'Chancellors from Adenauer to Merkel', Thursday, Sept. 3, 2009 in Berlin. The exhibition is open from Sept. 4 to Oct. 4, 2009. Pictures show former chancellor Willy Brandt. AP Photo logo AP Photo 3 months ago

A visitor looks at photographs by German photographer Konrad R. Mueller, during a press preview of his exhibition 'Chancellors from Adenauer to Merkel', Thursday, Sept. 3, 2009 in Berlin. The exhibition is open from Sept. 4 to Oct. 4, 2009. Pictures show former chancellor Willy Brandt.