Long before the "Iron Curtain" fell, a conference on the shores of Lake Geneva celebrated the end of classified documents and secret research behind closed doors: From 1-13 September 1958, 5000 scientists, government officials and observers from both East and West had come to the old League of Nations building in Geneva - and the nearby exhibition hall that had been constructed especially for this first nuclear world "fair" - to bear witness to the revelation of nuclear research. Some of the participants, among others the 2nd Secretary-General of the United Nations Dag Hammarskjöld, got the possibility to visit CERN.