A study made public this month by the National Nuclear Security Administration concluded that the U.S. stockpile of weapons-grade plutonium is aging but not at a rate that is affecting nuclear ...

China has repeatedly called out the AUKUS nuclear submarine deal between Australia, the U.S. and the U.K. as violating the treaty.

Eight of the world’s nine nuclear powers detonated a device before anyone called them nuclear powers. The ninth is Israel, and its case has gone unresolved for 47 years. Iran has detonated nothing.

The global nuclear order is entering a period of renewed strain. Competition among major countries is intensifying, and some states are assigning nuclear weapons a larger role in national security ...

The confused rollout of the proposed nuclear power deal with Saudi Arabia has created an opportunity to advance several vital ...

Recent strikes on Iranian nuclear-related sites have brought renewed attention to a question that has been debated for years. How close is Iran to developing a nuclear weapon. The issue has resurfaced ...

Nuclear Test Ban Treaty, Curiosity’s Mars landing, Henry I, upper Volta independence, Marilyn Monroe, Neil Armstrong.

WASHINGTON, March 24 (Reuters) - A senior State Department official on Tuesday said the U.S. still is assessing how to implement President Donald Trump's order to resume U.S. nuclear weapons tests, ...

China's submarine-fired ballistic missile test into the southern Pacific on Monday gave its military leadership an opportunity to examine some of the most complex and sensitive operations of its ...