Assaults on Iraq oil fields sow worry over global gas prices

Both Iraq's government army and fighters from ISIL have claimed to have the upper hand in a week-long battle for Iraq's biggest oil refinery. The clashes have stopped oil production at the Beiji complex, but amid the chaos, the price of crude exports has risen by only $2.35 a barrel. Gwen Ifill talks to Gianna Bern of Brookshire Advisory and Research and Greg Priddy of the Eurasia Group.