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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.
Testifying before Congress, Gen. Martin Dempsey didn't rule out sending U.S. military advisers in Iraq closer to combat.
CNN'S Jim Sciutto reports on which countries are joining the effort to battle ISIS and which ones are still hesitant.
With estimates about the number of ISIS fighters increasing, Jim Sciutto asks: what exactly is the U.S. up against?