[File photo] This undated file image posted on a militant website on Jan. 14, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) marching in Raqqa, Syria.
CIA: ISIS has more than 20,000 fighters
The CIA now says there are between 20,000 to 31,500 ISIS fighters operating in Iraq and Syria. CNN's Jim Sciutto reports.
02:15 - Source: CNN
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[File photo] This undated file image posted on a militant website on Jan. 14, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al-Qaida linked Islamic State of Iraq and the Levant (ISIL) marching in Raqqa, Syria.
CIA: ISIS has more than 20,000 fighters
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