DAMASCUS, SYRIA – JANUARY 31: In this handout provided by the United Nation Relief and Works Agency (UNRWA), Residents wait in line to receive food aid distributed in the Yarmouk refugee camp on January 31, 2014 in Damascus, Syria. The United Nations renewed calls for the Syria regime and rebels to allow food and medical aid into the Palestinian camp of Yarmouk. An estimated 18,000 people are besieged inside the camp as the conflict in Syria continues. (Photo by United Nation Relief and Works Agency via Getty Images)