MSNBC All In With Chris Hayes March 4, 2022 01:24:00
For nonproliferation and arms control at the national security council. and he's currently a special adviser to global zero, and international movement for the elimination of all nuclear weapons, and he joins me now. john, you and other nuclear experts, and watching life, we'll time responses to this about how freak-out should we be? what do we know about how dangerous is? how should we think about this? >> so, when i just tweeted out when i heard about this story was that we need to take a deep breath. i know there is an instinct to jump to, is this chernobyl how much endanger are we, but we ...