A woman votes in the first round of the Tunisian presidential election on Nov. 23. The election went smoothly, but no candidate won 50 percent of a vote, forcing a runoff between the top two on Sunday. Hassene Dridi/AP hide caption

The Iraqi town of Halabja is dominated by Kurds, the group that has been fighting the Islamic State in northern Iraq. However, some Kurdish residents have been slipping away to join the Islamic State. Yahya Ahmad/Reuters/Landov hide caption

Many Yazidis, like the ones shown here, managed to flee the onslaught of the so-called Islamic State and made their way to relative safety, like this camp near the northern Iraqi border crossing of Zakho. However, some 5,000 Yazidis, many of them women, are still being held hostage by the Islamic State. EPA/Landov hide caption

The Islamic Youth Council in Derna, in eastern Libya, is among the local militant groups from Egypt to Libya that have reportedly pledged allegiance to the self-proclaimed Islamic State. Reuters/Landov hide caption