Heavy violence, drought, and soaring food prices mean that half of the population of the African country of Somalia is in immediate need of food aid in order to prevent a famine, according to a new study. Every sixth child under the age of five is acutely malnourished, and three and a quarter million people are in need of immediate aid, a number 77% higher than last year, according to the Food Security Analysis Unit (FSAU), which is based in Nairobi, Kenya.