Amid Russia-Ukraine crisis, what’s the risk of a nuclear strike?

Russian President Vladimir Putin put his nuclear deterrent forces on high alert late last week, raising the spectre of nuclear strikes globally. Matt Galloway talks with Ankit Panda, the Stanton Senior Fellow in the nuclear policy program at the Carnegie Endowment for International Peace; and asks David Perry, president of the Canadian Global Affairs Institute, whether Putin expected the resistance his forces have met in Ukraine.