Islamic State exploits the chaos of civil war in Libya

Aired: 2/16/2015 | 0:07:42 | Clip
The murder of Egyptian Christian hostages by the Islamic State in Libya raises the alarm that the militant group is expanding from its territory in Syria and Iraq. Gwen Ifill talks to Frederic Wehrey of the Carnegie Endowment for International Peace and Michael Leiter, former director of the National Counterterrorism Center.