A girl walks through mud to get water at the Yusuf Batil refugee camp at the Upper Nile, South Sudan, July 4, 2012. Refugees are fleeing towards the Yusuf Batil refugee camp from the heavy seasonal rain that recently flooded areas and gravely expanded the risk of illness. Picture taken July 4, 2012. REUTERS/Adriane Ohanesian (SOUTH SUDAN - Tags: SOCIETY)