What keeps the world’s top nuclear watchdog up at night? It's not only Vladimir Putin threatening to use a tactical nuke in Ukraine. On the GZERO World podcast, Rafael Grossi, Director General of the International Atomic Energy Agency, joins Ian Bremmer to discuss the most imminent nuclear threats. He discusses his recent trip to an embattled Ukrainian nuclear power plant, the path forward for Iran after a scuttled deal, and how to keep North Korea in check, a rogue state amassing an entire arsenal of nukes.​

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