U.S. cautious about diplomatic deal to calm Ukraine conflict

Aired: 4/17/2014 | 0:05:21 | Clip
After several hours of negotiation, diplomats including Secretary of State John Kerry and Russia’s Sergei Lavrov announced a tentative agreement to ease conflict in Eastern Ukraine. But can Russia and Ukraine actually agree on the real terms of the deal? Chief foreign affairs correspondent Margaret Warner joins Gwen Ifill to discuss the politics and prospects.