The United Nations' head of humanitarian aid, Jan Egeland, recently spent a day sitting in an airport in Uganda. He was waiting for permission to fly on a UN plane into neighbouring Sudan. When the necessary paperwork from the Sudanese government was not forthcoming, Mr Egeland hopped onto a commercial flight to Juba, in south Sudan. He intended to fly from there to Darfur, in west Sudan. His plan was for a symbolic overnight stay in a particularly nasty bit of Darfur-the vast desert region that has seen perhaps 300,000 people killed and more than 2m displaced in the last three years of fighting there.
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