Everyone loves to say that nuclear weapons are so destructive that they've kept us all safe for decades. But, have they? Nukes expert Kelsey Davenport recalls how during the Cold War the US and the Soviet Union came very close to attacking each other with nukes, and America once almost accidentally detonated a nuke on its own soil. "We've really been quite lucky to have avoided an intentional or accidental nuclear exchange at this point. And my fear is that one day, our luck is going to run out." Despite all that, Davenport says nukes no longer make headlines because they feel "very abstract" for people. Davenport spoke with Ian Bremmer on GZERO World.

Watch the episode: Nuclear weapons: more dangerous than ever?