Saudi Arabia on edge after ISIS-claimed mosque attack

Aired: 5/23/2015 | 0:02:48 | Clip
This weekend, Islamic State militants claimed responsibility for a suicide bombing at a mosque in Saudi Arabia where at least 21 people were killed. The Saudi king later vowed to punish those involved. Erin Cunningham, a reporter for The Washington Post, joins Hari Sreenivasan via Skype from Cairo.