U.S., Russia meet amid stark disagreements over Ukraine

It is one of the most significant crises with Russia since the end of the Cold War: 100,000 Russian troops on Ukraine’s border that the U.S. says could invade within weeks. Meanwhile, American and Russian diplomats have kicked off intense talks. Debra Cagan, a former American diplomat, and Dmitri Trenin, of the Carnegie Moscow Center, join Nick Schifrin to discuss.