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** FILE ** World Food Program (WFP) workers offload sacks of rice donated by the US Agency for International Development, at the WFP warehouse in Khartoum, Sudan in this Dec. 12, 2006 file picture. UN Secretary-General Ban Ki-moon warned Monday, April 14, 2008 that the rapidly escalating global food crisis has reached emergency proportions and threatens to wipe out seven years of progress in the fight against global poverty. He called for short-term emergency measures in many regions to meet urgent food needs and avoid starvation and longer-term efforts to significantly increase production of food grains. (AP Photo/Alfred de Montesquiou, file)