Two-year-old, Aden Salaad, looks up toward his mother, unseen, as she bathes him in a tub at a Doctors Without Borders hospital, where Aden is receiving treatment for malnutrition, in Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

A young Somali child being treated for severe malnutrition rests at a Doctors Without Borders hospital in Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

A child from southern Somalia stands outside a makeshift shelter in Mogadishu, Somalia after fleeing from southern Somalia. (AP Photo/Mohamed Sheikh Nor)

An old Somali woman displaced by drought, waits to receive rations at a camp in northern Mogadishu's Bondhere district, Somalia. (AP Photo/Mohamed Sheikh Nor)

A malnourished child cries in her mother's arms, at Wajir District hospital, Wajir Kenya. (AP Photo/ Sayyid Azim)

Duba Dagane watches over her cow who no longer produce milk, in Lagbogal, 56 kilometers, from Wajir town. (AP Photo/Sayyid Azim)

A young Somali boy being treated for malnutrition drinks therapeutic milk at a Doctors Without Borders hospital in Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

Newly-arrived Somali refugees hold their babies as they wait in line to receive initial food aid, after registering as refugees at a reception center in Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

Jacfar Issack Abdi, 6 months, looks up at his mother as he rests at a Doctors Without Borders hospital where he is being treated for malnutrition, in Dagahaley Camp outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

Somali refugees wait to board a bus to another camp, at Ifo, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

Somali children ride on top of baggage in a donkey-drawn cart as their family heads from the Somali border for the refugee camps around Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

Somali women soothe their children, who are receiving treatment for malnutrition, at a Doctors Without Borders hospital in Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

A boy recently arrived with his family from drought-stricken Somalia walks outside their makeshift shelter, built around a thorny acacia tree, on the outskirts of Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

A boy from the family of Rage Mohamed is caught in wind-blown dust as his family builds a makeshift shelter around a thorny acacia tree, on the outskirts of Dagahaley Camp, outside Dadaab, Kenya. It took the 15-person family five days to make the journey from their drought-stricken home in Somalia. (AP Photo/Rebecca Blackwell)

Somali children play with scraps of material at an informal settlement housing recently-arrived Somali refugees, on the outskirts of Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

Marwo Maalin feeds her daughter, one-year-old Habibo Bashir, as part of her treatment for severe malnutrition, at a Doctors Without Borders hospital in Dagahaley Camp, outside Dadaab, Kenya. (AP Photo/Rebecca Blackwell)

Somali men from southern Somalia carry their malnourished children from a refugee camp towards the hospital in Mogadishu, Somalia. Some thousands of people have arrived in Mogadishu over the past two weeks seeking assistance and the number is increasing by the day, due to lack of water and food caused by the worst drought in the Horn of Africa, the United Nations has said. (AP Photo/Farah Abdi Warsameh)

Somalis from southern Somalia receive food at a feeding centre in Mogadishu, Somalia. More than 10 million people are now affected in drought-stricken areas of Djibouti, Ethiopia, Kenya, Somalia and Uganda and the situation is deteriorating. (AP Photo/Farah Abdi Warsameh)

Malnourished children from southern Somalia get treatment in the corridor of the Banadir hospital in Mogadishu. The worst drought in the Horn of Africa has sparked a severe food crisis and high malnutrition rates, with parts of Kenya and Somalia experiencing pre-famine conditions, the United Nations has said. (AP Photo/Farah Abdi Warsameh)

Abdirisak Mursal, 3, a malnourished child from southern Somalia, get treatment in Banadir hospital in Mogadishu. (AP Photo/Farah Abdi Warsameh)

A Somali woman from southern Somalia, prepares food as her children watch at a camp for internally displaced people in Mogadishu, Somalia. (AP Photo Mohamed Sheikh Nor )

Somalis who fled from southern Somalia, hold pots and containers as they wait to receive food at a camp in Mogadishu, Somalia. (AP Photo Mohamed Sheikh Nor )

A woman with her baby from southern Mogadishu sit in an open area near a camp in Mogadishu, Somalia. (AP Photo/Mohamed Sheikh Nor )

Holding their utensils, Somalis from southern Mogadishu, wait to receive food at a camp in Mogadishu. (AP Photo Mohamed Sheikh Nor )

Somali women from southern Somalia carrying their babies and belongings make their way to the new camp in southern Mogadishu's Hosh neighborhood. (AP Photo/Farah Abdi Warsameh) .

A severely malnourished child from southern Somalia lies on bed conforted with the hand of his mother at Banadir hospital, Mogadishu, Somalia. (AP Photo/Farah Abdi Warsameh)

A Somali child from southern Somalia holds his brother as they wait outside a ruined building before making their way to the internally displaced persons camps in Mogadishu, Somalia, after fleeing from southern Somalia. (AP Photo/Farah Abdi Warsameh)

Somalis from southern Somalia stand behind barbed wire in a line to receive aid at a refugee camp in Mogadishu, Somalia. (AP Photo/Farah Abdi Warsameh)