Joaquin Castro, publicly asked Secretary of State Marco Rubio on May 4 to end the long-standing U.S. policy of ambiguity ...

Satellite imagery of two Kusong sites in North Pyongan province shows new construction and repairs linked to nuclear weapons ...

Iran’s nuclear program is often discussed as if it were a single secret project, but in reality it is a mix of declared ...

Experts warn any new Iran deal must ban plutonium reprocessing and expose covert pathways to nuclear weapons, citing risks ...

For decades, nuclear weapons have been treated as the ultimate arbiter of international politics. They were supposed to deter great-power war, impose caution on leaders, and anchor what strategists ...

Editor’s note: This is part of an “experts comment” series on the expiration of New START. The expiration of the New Strategic Arms Reduction Treaty (New START) this week means that the United States ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A nuclear bomb map created using a simulation tool shows the ...

French diplomats who helped negotiate the 2015 Vienna agreement, aimed to prevent Tehran from acquiring nuclear weapons, now ...

Member states of the Association of Southeast Asian Nations (ASEAN) have pledged to maintain the region as a nuclear ...