Iran and EU representative to iron out nuclear talks details

Aired: 11/21/2013 | 0:04:52 | Clip
Substantive talks are underway about Iran's nuclear program in Geneva, but only between EU/UN co-chair Catherine Ashton and Iran's foreign minister, Mohammad Javad Zarif, reportedly at Iran's insistence. Gwen Ifill talks to Margaret Warner, reporting from Geneva, about urgent pressures and outstanding points of contention.