Fearing massacre, Iraqis ask U.S. for additional support

In the town of Iraqi town of Amirli, 15,000 Shiite Turkmen civilians have been under siege by Islamic State militants for more than 70 days without adequate food, water or medicine. Hari Sreenivasan gets an update from chief foreign affairs correspondent Margaret Warner on what the Iraqi military is asking the United States to provide in order to stave off a potential massacre.