Balancing the U.S. commitments to reduce the number and role of nuclear weapons while strengthening extended deterrence and assuring allies has emerged as a significant challenge in the new security environment. This challenge is all the greater because what may deter Russia and China may not deter North Korea or a nuclear-armed Iran and may not be well suited to reassuring America’s allies in Europe, Northeast Asia and the Middle East. What kind of measures or policies can satisfy these criteria? What potential steps might exacerbate the challenge?

Brad Roberts, Łukasz Kulesa, Jiří Šedivý, and Koji Tomita take a look at what kind of measures or policies can satisfy these criteria and what potential steps might exacerbate the challenge. Share your comments and questions below.