Diplomacy picks up in Europe amid Russian threat in Ukraine

Russian President Vladimir Putin on Tuesday accused the U.S. and its allies of ignoring Moscow's security demands but said he's willing to hold more talks amid tensions over Ukraine. Katarzyna Pisarska, chair of the Warsaw Security Forum, and Thomas Kleine-Brockhoff, vice president and director of the Berlin office of the German Marshall Fund of the United States, join Nick Schifrin to discuss.