Reports & Papers

In the lead-up to the nuclear security summit, Advancing Nuclear Security: Evaluating Progress and Setting New Goals outlines what was accomplished in a four-year effort launched in 2009 to secure nuclear material around the globe—and what remains to be done. The effort made significant progress, but some weapons-usable nuclear materials still remain “dangerously vulnerable." The authors highlight the continuing danger of nuclear and radiological terrorism and call for urgent action.

On the eve of the Nuclear Security Summit in Seoul, South Korea, a new study finds that an international initiative to secure all vulnerable nuclear stockpiles within four years has reduced the dangers they pose.

A detailed assessment of the campaign to consolidate dangerous nuclear materials worldwide in fewer, more secure sites, with analysis of success stories, ongoing risks, near-term opportunities, and numerous recommendations for next steps.

When do states attack or consider attacking nuclear infrastructure in nonnuclear weapons states? Despite the importance of this question, relatively few scholarly articles have attempted to identify the factors that lead a state to attack another state's nuclear facilities. This paper conducts the first large-n analysis on when states use force as a way to control proliferation.

This paper challenges existing arguments that states are deterred from attacking nuclear programs by the prospect of a military retaliation from the proliferating state or concerns about international condemnation. Instead, it finds that states are more likely to attack nuclear programs when they believe that the proliferating state might use nuclear weapons or engage in other offensive behavior. States are willing to accept substantial costs in attacking if they believe that a particular country's acquisition of nuclear weapons poses a significant threat to their security.

Leaders at the 2010 nuclear security summit agreed on the goal of securing all vulnerable nuclear material in four years, but the factors that drive and/or constrain nuclear security changes are not well understood. Matthew Bunn and Eben Harrell surveyed nuclear security professionals in countries with nuclear weapons, HEU, or separated plutonium to explore this issue. This paper describes the survey, its results, and implications for strengthening global nuclear security.