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The former head of U.S. counterterror operations said Tuesday the "imminent threat" posed by an al Qaeda offshoot in Syria hasn't lessened after a U.S. air campaign there.
Speaking to CNN's Jim Sciutto, Matt Olsen said by his analysis the threat from the Khorasan group "is still in the same place as it was before" President Barack Obama ordered airstrikes against the terror operation last month. Full story
As ISIS descends on Kobani near the Syria-Turkey border, Turkey says it won't go at it alone fighting ISIS on the ground.
A city on the Turkey-Syria border may fall to ISIS, bus U.S. airstrikes continue to target ISIS' operating headquarters.
ISIS continues to hold territory as airstrikes continue in Syria. Jim Sciutto has the latest.
ISIS has released an audio tape in which one of its leaders calls for attacks against the West. Jim Sciutto reports.
Jim Sciutto reports that many intelligence officials now say they underestimated the threat posted by ISIS.
A training camp near the ISIS stronghold in northern Iraq became the target of U.S. warplanes. CNN's Jim Sciutto reports.