A man unloads a bag of food delivered by USAID, the United States federal government agency primarily reponsible for administering civilian foreign aid, at the Christian refugee camp in Bossangoa on December 19, 2013. The United States today announced $15 million in additional humanitarian aid for the Central African Republic, as a top US envoy was visiting Bangui to press for an end to sectarian bloodshed. AFP PHOTO / FRED DUFOUR        (Photo credit should read FRED DUFOUR/AFP/Getty Images)