What's the Off-Ramp?

"I see two fundamental things in contradiction. After World War I, we know that a harsh punitive piece on Germany helped lead to World War II," he says. "Unless this imperial, this vicious thing that is in Putin's style of governance, unless that's really destroyed, we're just going to postpone the next war." 'We don't know what it looks like for a country that has a nuclear weapon to lose,' Obama adds.