The only person to be awarded a Nobel Peace Prize posthumously, Hammarskjöld was the second Secretary General of the United Nations. In this role, he greatly extended the influence of the United Nations and personally led peace missions, though he clashed with the Soviet Union for his vigorous attempts to diffuse civil strife in the newly independent Congo. He served as Secretary General until his death in a mysterious plane crash in 1961. What conspiracy theories surround his death? Discuss
Source: The Free Dictionary