Displaced families line up to receive food rations at a feeding center in Somalia. Mohamed Abdiwahab/AFP/Getty Images hide caption

itoggle caption Mohamed Abdiwahab/AFP/Getty Images

Somali civilians line up for food during the famine this year. Militants are banning relief agencies who warn a quarter of a million Somalis are at risk of starvation. Mohamed Sheikh Nor/AP hide caption

itoggle caption Mohamed Sheikh Nor/AP

Children from southern Somalia fill jugs with water at a refugee camp in Mogadishu Tuesday. The number of people fleeing famine-hit areas of Somalia is likely to rise dramatically and could overwhelm international aid efforts in the Horn of Africa, a U.N. aid official said Tuesday. Farah Abdi Warsameh/AP hide caption

itoggle caption Farah Abdi Warsameh/AP

Somali refugees wait at dawn at a registration center at the Dadaab refugee complex in Kenya Tuesday, to receive aid after having been displaced from their homes in southern Somalia by famine. Tony Karumba/AFP/Getty Images hide caption

itoggle caption Tony Karumba/AFP/Getty Images