Children in Afghanistan suffer one of the highest levels of chronic malnutrition in the world, a report said Monday, despite billions of dollars in aid that have poured into the war-torn country. More than half of Afghan children under the age of five are chronically malnourished, according to the joint report by the World Bank and the government. “Because of the ongoing conflict, foreign assistance has disproportionally gone to the provinces where concentration of troops and fighting has been heaviest,” said acting World Bank country director Josephine Bassinette.