What's the U.S. role in calming Ukraine unrest?

Aired: 12/9/2013 | 0:03:30 | Clip
Now in the third week of widening unrest, Ukrainian protesters are bracing for a crackdown. Gwen Ifill talks to David Herszenhorn of The New York Times about what's going on behind the scenes and the outlook for a solution to end the civil crisis, plus how the United States has reached out to the government to urge caution.