The United States hasn't tested nuclear weapons in three decades — but that might be about to change. The big picture: President Trump called for renewed nuclear tests on Wednesday, something the U.S.

The National Nuclear Security Administration urgently asked the White House for funds to prevent the agency from having to furlough its staff, sources told CNN.

The head of the Comprehensive Nuclear-Test-Ban Treaty Organization, or CTBTO, said on Thursday that any explosive nuclear weapon test would be harmful for global non-proliferation efforts and peace and security.

The Trump administration asked Congress for $5.5 billion more in annual spending for the weapon activities of the federal agency that oversees the nation’s nuclear arsenal. By William J. Broad The White House is asking Congress for a large jump in the ...

The National Nuclear Security Administration announced on May 19, 2025, that production of the first B61-13 variant nuclear bomb has been completed at the Pantex plant in Amarillo, Texas. The first completed bomb unit was unveiled at a small ceremony at ...

In 2021, after a pair of plutonium-handling gloves had broken for the third time at the Los Alamos National Laboratory, contaminating three workers, and after the second accidental flood, investigators from the National Nuclear Security Administration ...

The U.S. and China lead global efforts to make nuclear fusion commercially viable, with billion-dollar projects aiming for net-positive energy. Los Alamos scientists successfully recreated a 1938 experiment, achieving deuterium-tritium fusion at much lower ...

If you would like to learn more about the IAEA’s work, sign up for our weekly updates containing our most important news, multimedia and more. In a pioneering effort to combat wildlife trafficking of the threatened rhinoceros, a South African University ...