Islamic State of Iraq and Syria Islamic State of Iraq and Syria

Kurdish Regional Government Peshmergas attend a military training exercise conducted by U.S.-led coalition trainers at the Bnaslawa military training camp in Irbil, Iraq, in March. Yunus Keles/Anadolu Agency/Getty Images hide caption

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Yunus Keles/Anadolu Agency/Getty Images

A member of Iraq's elite counterterrorism service flashes the "V" for victory sign Tuesday in Ramadi, the capital of Iraq's Anbar province. Iraq's prime minister says the extremist group will be pushed out of Iraq in 2016. Ahmad Al-Rubaye/AFP/Getty Images hide caption

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Ahmad Al-Rubaye/AFP/Getty Images

After Ramadi, A Look At What's Next In The Fight Against ISIS

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This undated file image posted on a militant website on Jan. 14, 2014, shows fighters from the Islamic State of Iraq and the Levant (ISIL) marching in Raqqa, Syria. Uncredited/AP hide caption

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The Psychology Of Radicalization: How Terrorist Groups Attract Young Followers

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"You've got to respect how this guy keeps on saying stuff he surely doesn't actually believe himself and KNOWS are impossible and unconstitutional to actually do," writes a reader of the Jakarta Post, after presidential candidate Donald Trump spoke of a ban on Muslims entering the U.S. Sean Rayford/Getty Images hide caption

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