One of the worst fears in the post 9-11 world is that the threat of nuclear terrorism will become reality. Nonproliferation expert, Robert Litwak has for decades been immersed in the work of securing nuclear weapons and materials from spreading and falling into the hands of actors that would not hesitate to put them to destructive use. His books on “Rogue” and “Outlier” states have provided valuable ways to think about and address the threats posed by potential abuses of nuclear technologies. In his latest work, Deterring Nuclear Terrorism, he offers a framework for understanding and addressing risks and threats in the age of terrorism. We discuss his insights in this edition of  Wilson Center NOW.