In this picture taken on Monday Feb. 24, 2014, and released by the United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA), residents of the besieged Palestinian camp of Yarmouk stand in line to receive sandwiches distributed by UNRWA, in Damascus, Syria. U.N. Secretary General Ban Ki-Moon urged Syrian government to authorize more humanitarian staff to work inside the country, devastated by its 3-year-old conflict. (AP Photo/UNRWA)