Oklahoma City bombing Videos

Here's What ISIS Believes and How It Came to Be

(6) tv-pg

Here's What ISIS Believes and How It Came to Be

(6 min) tv-pg

Learn about the origins of ISIS and its leader Abu Musab al-Zarqawi, who terrorized Iraq's Shia Muslims with suicide bombers. Discover how successor Abu Bakr al-Baghdadi used social media to spread international terrorism before the group weakened.