The World Food Program is moving to address hunger among the most vulnerable in famine-ravaged Horn of Africa — young children and their mothers, the U.N. food chief said Friday. World Food Program Executive Director Josette Sheeran told The Associated Press that the agency is concentrating especially on children 2 years old and younger, airlifting into the region 244 metric tons of a highly fortified peanut butter-like food paste made from nuts.