GZERO WORLD with Ian Bremmer | Episode | Meet the Man Trying to Prevent Nuclear War

Rafael Grossi, the world's top nuclear watchdog, on the most imminent nuclear threats facing the world. He discusses his recent trip to an embattled Ukrainian nuclear power plant, what he sees as the path forward for containing Iran after a scuttled nuclear deal, and how to keep North Korea in check. And on a brighter note, the latest on the scientific breakthroughs around fusion energy.