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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.
Brian Todd reports on a video that may show a North American member of ISIS committing a war crime.
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.