What Kurdish forces lack in fight against Islamic State

Aired: 8/22/2014 | 0:09:44 | Clip
Why has the famed Peshmerga army in Iraq, considered one of the best in the region, fallen back at several points along its internal frontier against the Islamic State? To investigate, chief foreign affairs correspondent Margaret Warner spent the day with Kurdish military leaders as they traveled to the town of Jalawla. She joins Judy Woodruff for an update.