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John Cantlie is the latest hostage to be paraded out by ISIS - forced to deliver the group's message. Brian Todd 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.
As ISIS tightens its brutal grip on vast stretches of Iraq and Syria, women are playing an active role in its reign of terror. CNN's Brian Todd has been looking into that.
U.S. officials have identified a second man who may have been killed fighting along ISIS terrorists - and there has been a recent rise in the number of radicalized Americans heading overseas to fight for jihadist organizations. CNN's Brian Todd reports.
As the Obama administration weighs airstrikes against ISIS terrorists in Syria, officials are concerned at the jihadist group's growing strength, impressive tacticts and "uncanny" discipline. Brian Todd reports on ISIS becoming stronger and more capable.
Brian also took to Twitter to answer your questions on ISIS. Here's a recap.
After an American man was killed fighting with ISIS in Syria, there are new reports that other Americans are joining the lethal terror group. CNN's Brian Todd reports.
British authorities say they are close to identifying the ISIS terrorist who executed American James Foley in that brutal video. CNN's Brian Todd takes you inside the investigation.
One of the e-mails ISIS sent James Foley's family warned they wouldn't stop until "we quench our thirst for your blood." CNN's Brian Todd reports on the horrific messages the terrorist group sent the American journalist's family.
American freelance journalist James Foley is reported to have been beheaded by ISIS, in a gruesome video posted online. CNN's Brian Todd looks back at his life and his work.