Under the Black Flag

I reviewed ISIS: Inside the Army of Terror by Michael Weiss and Hassan Hassan for Commentary. Here's the first half.

ISIS isn’t a terrorist organization. It’s a transnational army of terror. The CIA claims it has as many as 31,000 fighters in Syria and Iraq, and Massoud Barzani, president of Iraq’s Kurdistan Regional Government, thinks the number may be as high as 200,000. When ISIS fighters conquered the Iraqi city of Mosul last year, they stole enough materiel to supply three fighting divi...