This image, posted on a militant website, shows an Islamic State fighter waving a flag from a captured government fighter jet in Raqqa, Syria. The Islamic State captured the city in northeastern Syria last year and it has effectively served as its capital. Uncredited/AP hide caption

itoggle caption Uncredited/AP

Smoke rises from the Beiji oil refinery during clashes between the Islamic State and Iraqi government forces in Beiji, northern Iraq, on July 30. The militants tried to take the refinery this summer, but government forces have held on. STR/EPA/Landov hide caption

itoggle caption STR/EPA/Landov

Ayaman with his wife, Selma, and their 1-month-old daughter, Shana, who was born in Turkey. Syrian refugee parents who give birth in Turkey are finding it difficult to register their newborns, and many are stateless. Jodi Hilton for NPR hide caption

itoggle caption Jodi Hilton for NPR

A Syrian man carries a girl on a street covered with dust following a government airstrike in Aleppo on Tuesday. Rebels took the eastern half of the city in 2012 but are now in danger of being forced out by President Bashar Assad's troops. Baraa Al-Halabi/AFP/Getty Images hide caption

itoggle caption Baraa Al-Halabi/AFP/Getty Images

People walk through the market area in Erbil, Iraq. Tens of thousands of displaced Iraqis and Syrians have converged on the ancient city after fleeing fighting in their hometowns. Spencer Platt/Getty Images hide caption

itoggle caption Spencer Platt/Getty Images