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A training camp near the ISIS stronghold in northern Iraq became the target of U.S. warplanes. CNN's Jim Sciutto reports.
An al Qaeda cell operating in Syria is posing a new threat to the U.S. CNN's Pamela Brown has the details.
The Senate voted in favor of the U.S. supplying arms and training the Syrian rebels in the war against ISIS.
John Cantlie is the latest hostage to be paraded out by ISIS - forced to deliver the group's message. Brian Todd reports.
Some officials say so-called 'lone wolves' are a more immediate threat to the U.S. than ISIS. Pamela Brown reports.
Brian Todd reports on a new, stylized propaganda video released by ISIS that appears to threaten the U.S.
Brian Todd looks at how ISIS is stepping up recruitment and propaganda efforts by debuting a new online magazine.
Testifying before Congress, Gen. Martin Dempsey didn't rule out sending U.S. military advisers in Iraq closer to combat.
Brian Todd examines clues in the video of David Haines' execution. Do British authorities know who the executioner is?
Pamela Brown reports that a suspect in a string of killings might have been motivated by strong anti-U.S. sentiments.