Exclusive: Military leaders warn of 'ISIS insurgency' in Iraq, Syria breeding ground

"World News Tonight" anchor David Muir got unprecedented access with U.S. troops trying to locate ISIS members desperate to resurge in Iraq and Syria.
[Source: abcnews.go.com] [ Comments ] [See why this is trending]
[Source: abcnews.go.com] [ Comments ] [See why this is trending]
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