What’s fueling and funding ISIL?

Aired: 6/16/2014 | 0:08:34 | Clip
The Sunni militants known as ISIL or ISIS continue to broaden their control over the northern Iraq. What are their origins and how does the group compare to other insurgencies? Gwen Ifill learns more from journalist Rania Abouzeid and Brian Fishman of the New America Foundation.