Syria has imposed new restrictions that could prevent many Iraqi refugees from entering the country. Syria had been the last Arab country welcoming large numbers of Iraqi refugees. On Monday, more than 5,000 Iraqis lined up in Damascus to register with the U.N. refugee agency. Iraqis fear Syria could order a mass deportation of refugees living in the country illegally. Since the war began, an estimated 1.8 million refugees have fled Iraq. The United Nations estimates up to 50,000 Iraqis continue to flee the country each month. But now the refugees have dwindling options of where to go.