US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

The US controls nuclear weapons in five NATO countries, but Europe may choose a new path amid strained relations.

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

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.

Resuming full testing of nuclear weapons — as President Donald Trump called for last week — would be unnecessary, costly, undermine nonproliferation efforts, and empower the nation’s adversaries to ...

My first encounter with one of the devices was about six decades ago (and only three decades after its improvement as an ...

Warsaw should base its security strategy around ‘nuclear potential,’ Polish president said. Polish President Karol Nawrocki thinks his country should start developing nuclear defenses, given the ...

There are several options for Poland to become a nuclear-armed state, including attempting to build its own nuclear weapons. However, doing so would abandon a norm that has been in place in the West ...