Austrian President Heinz Fischer (L) and United Nations Secretary-General Ban Ki-moon gesture during a celebration ceremony to mark the 30th anniversary of Vienna's UN headquarters, the Vienna International Centre, in Vienna August 28, 2009. Reuters Pictures logo Reuters Pictures 30 months ago

Austrian President Heinz Fischer (L) and United Nations Secretary-General Ban Ki-moon gesture during a celebration ceremony to mark the 30th anniversary of Vienna's UN headquarters, the Vienna International Centre, in Vienna August 28, 2009.