"New evidence has emerged in one of the most enduring mysteries of United Nations and African history, suggesting that the plane carrying the UN secretary general Dag Hammarskjöld was shot down over Northern Rhodesia (now Zambia) 50 years ago, and the murder was covered up by British colonial authorities.
Björkdahl concludes that:
• Hammarskjöld's plane was almost certainly shot down by an unidentified second plane.
• The actions of the British and Northern Rhodesian officials at the scene delayed the search for the missing plane.
• The wreckage was found and sealed off by Northern Rhodesian troops and police long before its discovery was officially announced.
• The one survivor of the crash could have been saved but was allowed to die in a poorly equipped local hospital.
• At the time of his death Hammarskjöld suspected British diplomats secretly supported the Katanga rebellion and had obstructed a bid to arrange a truce.
• Days before his death, Hammarskjöld authorised a UN offensive on Katanga – codenamed Operation Morthor – despite reservations of the UN legal adviser, to the fury of the US and Britain."