Airs Sunday, June 5, at 6 p.m. Since the Syrian Civil War began in 2011, more than 4 million Syrians have fled the country, creating the greatest refugee crisis since World War II. The United States has taken in just over 2,000 Syrian refugees since the war’s start, and the Obama administration has pledged to take another 10,000 in 2016. What are our moral obligations, and what are the cultural, economic, and security issues that must be taken into account? Should the U.S. let in 100,000 Syrian refugees?