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Brian Todd reports on the intensified effort to find 'Jihadi John' – the militant in ISIS beheading videos.
A defector claims Kim Jung Un is not in charge, that a shadowy group is pulling the strings. Brian Todd reports.
U.S. and British officials have released statements condemning the brutal beheading of British aid working Alan Henning.
A video posted by ISIS shows the apparent beheading of British hostage Alan Henning. CNN's Brian Todd has more. Full story
American threatened in new ISIS video
In an ISIS video showing the apparent beheading of Alan Henning, a militant threatens the life of American Peter Kassig.
Brian Todd reports on recent social media posts from American ISIS supporters and how the U.S. is tracking them.
What went wrong at various stages of the White House fence-jumping breach? Brian Todd reports.
Brian Todd reports on accusations that the Secret Service bungled the response to a shooting at the White House in 2011.
Saudi Arabia, an key U.S. ally against ISIS, frequently beheads people for non-lethal crimes. CNN's Brian Todd reports.
Amid new U.S. airstrikes in Iraq and Syria, will terrorists retaliate by taking more hostages? CNN's Brian Todd reports.
Brian Todd gets inside accounts of life in Raqqa, Syria, the ISIS stronghold bombed by the U.S. and its allies.