To prevent nuclear war, borrow from 1973 | Bulletin of the Atomic Scientists

To prevent nuclear war, borrow from 1973 | Bulletin of the Atomic Scientists: North Korea’s nuclear build-up continues. Vladimir Putin announced on March 1 that Russia had developed new nuclear weapons—an announcement timed, no doubt, to one-up the US Nuclear Posture Review, which was released in February. Amid developments such as these, some observers worry that nuclear weapons are back, big time.