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In this photo taken on Sunday, April 8, 2012, a man walks over a railroad bridge between Pyongyang and North Korea's North Phyongan Province. The United Nations has called for $198 million in donations for 2012 - mostly to help feed the hungry but also to invest in programs designed to prevent the chronic deprivation that has led to persistent malnutrition among North Korea's young. (AP Photo/David Guttenfelder)