Satellite imagery of secretive nuclear facilities reveals Beijing's efforts to expand its arsenal, just as the last global ...

A pair of lawmakers exhorted the Energy Department's top official to consider reining in a major nuclear arsenal modernization program amid long-running concerns over its cost and schedule performance ...

China is rapidly overhauling a network of secret facilities used to manufacture warhead components as it expands its nuclear stockpile faster than any other country, according to an analysis of ...

The lab where Oppenheimer developed the atomic bomb is the linchpin in the United States’ effort to modernize its nuclear weapons. Yet the site has contended with contamination incidents, work ...

Technicians at a training site worked with a glove box, which is used to handle radioactive material. Credit: Los Alamos National Laboratory In a sprawling building atop a mesa in New Mexico, workers ...