[The Conversation Africa] Democratic South Africa has skeletons in the closet that it needs to address. One of these is the death of Dag Hammarskjöld, the Secretary-General of the United Nations (UN) in a plane crash shortly after midnight on 17 to 18 September 1961. The plane went down as it approached Ndola, a mining town in Northern Rhodesia (today's Zambia) bordering the Congo.