Down But Not Out: West Faces Long War Against Islamic State

More than 2000 IS militants are believed still to be fighting in Raqqa, many of them thought to be foreigners from North Africa, the Middle East and Central Asia. But even after the Islamic militants are defeated in the coming weeks in their self-styled Syrian capital, the terror group still will have an estimated 13,000 or so fighters in Syria and Iraq, posing a remaining threat in the Levant, warn U.S. officials and independent analysts.

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