UN Nuclear watchdog, the International Atomic Energy Agency (IAEA), has said that Iran holds 440.9 kg (972 pounds) of highly ...

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald Trump vows to restart U.S. tests.

Gravity nuclear bombs are some of the most dangerous nuclear weapons ever created. These kinds of bombs, also known as ...

US intelligence agencies believe China is developing a “new generation” of nuclear weapons — with Beijing having reportedly ...

Iran cannot use 60% enriched uranium directly in its current form (UF₆, which is stored as a solid in cylinders but handled ...

A US official says a seismic station in Kazakhstan collected evidence of an alleged China nuclear test at Lop Nur in June 2020.

Hydrogen bombs cause a bigger explosion, which means the shock waves, blast, heat and radiation all have larger reach than an ...

According to President Trump, the latest U.S. incursion into the Middle East is justified in part because he was not ...

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

Social media-fueled theories of World War 3 have raised questions over what US states are safe should nuclear war happen. Here's NJ safety concerns.

ALBUQUERQUE, N.M. — Transported in the backseat of a blacked-out Plymouth sedan was the culmination of years of feverish work — a hefty plutonium core that would soon be used to trigger the world’s ...

MOSCOW, Feb 24 (Reuters) - Russia accused Ukraine on Tuesday of trying to obtain a nuclear weapon with help from Britain and ...