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TO GO WITH AFP STORY BY AYMERIC VINCENOT An airplane carries out an food-drop over a field at a village in Nyal, an administrative hub of Panyijar county in Unity state, south Sudan, spilt from bags that bust open following the food-drop, on February 23, 2015. Isolated by the Sudd,the world's largest marsh area, population Nyal is protected from the horrors of war that ravaged South Sudan but starved and exposed to disease. Almost all Panyijar County, about 60,000 people dependent on food aid parachuted by the World Food Programme (WFP) says local prefect Tap Puot John, a member of the "opposition" whose troops fighting the government army since December 2013 control the area. AFP PHOTO/TONY KARUMBA (Photo credit should read TONY KARUMBA/AFP/Getty Images)

TO GO WITH AFP STORY BY AYMERIC VINCENOT 
An airplane carries out an food-drop over a field at a village in Nyal, an administrative hub of Panyijar county in Unity state, south Sudan, spilt from bags that bust open following the food-drop, on February 23, 2015. Isolated by the Sudd,the world's largest marsh area, population Nyal is protected from the horrors of war that ravaged South Sudan but starved and exposed to disease. Almost all Panyijar County, about 60,000 people dependent on food aid parachuted by the World Food Programme (WFP) says local prefect Tap Puot John, a member of the "opposition" whose troops fighting the government army since December 2013 control the area. AFP PHOTO/TONY KARUMBA        (Photo credit should read TONY KARUMBA/AFP/Getty Images)