The return of great power rivalry—whether U.S. versus Russia or U.S. versus China—has recreated the sense that nuclear war is possible. But what is the actual threat versus perceived threat and how can we manage our collective anxiety? Brandeis University's Professor Gary Samore, joins Doorstep co-hosts Nick Gvosdev and Tatiana Serafin to discuss how nuclear deterrence fosters restraint and caution, and the hope that a protracted Russia-Ukraine war will not tip the scales. For more, please go to carnegiecouncil.org.