H0036900 (hăm′ər-shōld′, -shəld, hä′mär-shœld′), Dag Hjalmar Agné Carl 1905-1961. Swedish political leader and secretary-general of the United Nations (1953-1961) who increased the UN's influence through his peacekeeping efforts in Suez, Lebanon, and Congo. He won the 1961 Nobel Peace Prize posthumously.