Thick smoke rises following an airstrike by the U.S.-led coalition in Kobani, Syria, while fighting continued between Syrian Kurds and the militants of the self-proclaimed Islamic State, as seen from Mursitpinar on the outskirts of Suruc, at the Turkey-Syria border on Wednesday. Lefteris Pitarakis/AP hide caption

itoggle caption Lefteris Pitarakis/AP

Rebels of the Kurdistan Workers Party, or PKK, begin to move out of Turkey to bases in northern Iraq, a key stage in the peace process with the Turkish government. Here, PKK fighters are shown near the Turkish border with Iraq on May 7. Firat News Agency/AP hide caption

itoggle caption Firat News Agency/AP