The work of improving nuclear security is not done, though leaders are no longer meeting at the summit level. The threats of nuclear theft and terrorism remain very real. States, nuclear operating organizations, and institutions and initiatives supporting nuclear security must strive for continuous improvement in nuclear security. The alternative is dangerous decline. Achieving genuinely effective implementation of existing recommendations and commitments in five key areas could dramatically strengthen nuclear security around the world.

Proponents of improved U.S.-Russian relations might take heart in Donald Trump’s surprise victory in the U.S. presidential election. Tangible positive changes are certainly possible, but fundamental differences over issues such as U.S. missile defense, NATO expansion and Russia’s willingness to use force against its neighbors, as well as the absence of robust economic ties, make a qualitative breakthrough in the bilateral relationship unlikely.

This article reviews the motivations, strengths, and weaknesses of the Nuclear SecuritySummits (NSS), both procedurally and substantively.

William H. Tobey reviews the motivations, strengths, and weaknesses of the nuclear security summits and provides recommendations for how governments can maintain momentum and awareness now that the summit process is over. He concludes that some of the innovations from the process will continue to be useful tools.

It will take focused, determined, and vigorous diplomacy in addition to the Obama administration's recognition that the Syria chemical weapons deal was not a proud moment to hold the Assad government accountable. To succeed, Obama will need to craft a consensus, albeit not necessarily a unanimous one, that the Assad government must go because it has repeatedly and grossly violated norms of civilized behavior, and that those who ordered and conducted the attacks must be held personally responsible.

Two specks of uranium might determine whether or not the Iran nuclear deal succeeds or fails. The U.S. government and the IAEA must not let the issue of the Parchin particles drop. In matters atomic, even minutiae can be critical.

President Obama convened more than 50 world leaders in Washington this week hoping that international progress on one of his long-standing policy priorities, nonproliferation, would outlast his administration, but the gathering served mostly to highlight the mixed record of Obama’s nuclear agenda.

The attacks in Brussels last month were a stark reminder of the terrorists’ resolve, and of our continued vulnerabilities, including in an area of paramount concern: nuclear security.

The attackers struck an airport and the subway, but some Belgian investigators believe they seemed to have fallen back on those targets because they felt the authorities closing in on them, and that their original plan may have been to strike a nuclear plant. A few months ago, during a raid in the apartment of a suspect linked to the November attacks in Paris, investigators found surveillance footage of a senior Belgian nuclear official. Belgian police are said to have connected two of the Brussels terrorists to that footage.

Senior Fellow Will Tobey speaks with WBEZ 91.5 Chicago about the Obama administration's nuclear security accomplishments ahead of President Obama's fourth and final nuclear security summit.

Obama’s sparring with Putin is hampering the push to prevent nuclear terrorism — and even raising the risk of an accidental nuclear confrontation.