The projected overrun would put the new intercontinental ballistic missile program in breach of a law designed to prevent major cost overruns.

Escalating regional tensions could push Tehran to determine it needs a nuclear deterrent for security or the United States to miscalculate Iran’s intentions and prematurely use military force against the country’s nuclear facilities. ... Increased monitoring provides greater assurance that any dash to nuclear weapons would be quickly detected and reduces the likelihood of the United States or Israel misjudging Iran’s nuclear activities, a move that could have devastating ripple effects.

International Atomic Energy Agency Director General Rafael Mariano Grossi called for diplomacy with Tehran after the agency reported that Iran increased its production of uranium enriched to near weapons grade. Grossi also criticized Iran for restricting cooperation with the agency.

As the new year begins, the existential risks posed by nuclear weapons continue to grow.

The National Nuclear Security Administration hosted experts on a visit to show how the Nevada site has transitioned from nuclear explosive testing to experiments aimed at ensuring the era of nuclear testing is over.

Congress authorized $260 million for a new nuclear-armed sea-launched cruise missile for fiscal year 2024, despite the Biden administration’s clear desire not to pursue the weapon’s development.

The United States is making progress in developing a safer low-enriched uranium fuel for use in Navy ships, but the project is very costly, and success is not assured.