Non-proliferation

If Joe Biden defeats President Donald Trump, he will face the question of how to revive U.S. participation on the international stage, including through rejoining many of the international…

One of the most eminent former US Ambassadors issues 9-page memorandum challenging the US government's position on the Iran nuclear deal.

General Debate opens; leaders urge cooperation and UNSC reform; Trump attempts to snapback sanctions on Iran, allies decline; and Special Envoy for Syria describes "ray of hope"…

The move comes as the Trump administration is  expected to try to 'snapback' UN Iran sanctions, collapse nuclear deal

An extension of New START would provide the United States the time and space to negotiate a follow-on arms control accord with Russia, China, and other nuclear powers.

Any US efforts that undermine key treaties would erode the global nonproliferation regime that advances the safety of civil nuclear technologies.

How do progressive activists find agency facing a nuclear weapons complex backed by the most powerful militaries in the world? Answers may lie in the history of the struggle against…

Renewed questions over the US nuclear umbrella, NATO and a new fighter jet obscure the reality of the country's most likely options.

Almost every problem that critics say this nuclear-weapons pact doesn't solve would be aggravated if the treaty expires.

(Editor’s Note: This is the latest in Just Security’s weekly series keeping readers up to date on developments at the United Nations at the intersection of national security,…

Resuming testing provides no strategic benefit and would undermine a treaty that has curbed the spread of nuclear weapons for more than 50 years.

More ambitious talks with the Russians and Chinese are a laudable goal. But they can be pursued smartly and without unnecessarily high risk.