Could ISIS become the greatest threat facing the U.S.?

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Could ISIS become the greatest threat facing the U.S.?

Could ISIS become the greatest threat facing the U.S.?
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Could ISIS become the greatest threat facing the U.S.?

by CBSTV Videos 6:01 mins

Former acting CIA Director Michael Morell joins CBS News' Bob Orr and Margaret Brennan to discuss the threat posed by extremists rampaging across Syria and Iraq.

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