-- AFP PICTURES OF THE YEAR 2015 -- Islamic State members ask people to go back to city center at the Turkish Akcakale crossing gate in Sanliurfa province, on June 13, 2015. Turkey said it was taking measures to limit the flow of Syrian refugees onto its territory after an influx of thousands more over the last days due to fighting between Kurds and jihadists. Under an "open-door" policy, Turkey has taken in 1.8 million Syrian refugees since the conflict in Syria erupted in 2011. AFP PHOTO / BULENT KILIC