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

For the first time since the end of the Cold War, European capitals are discussing how to develop their own deterrent.

Moscow reiterates willingness to adhere to expired nuclear weapons treaty, "as long as the United States does not exceed the ...

A top arms diplomat at the State Department recently laid out what might come next as Washington upends decades of federal policies on nuclear proliferation.

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is trying to spur negotiations on a new accord now that a last Cold War treaty ...

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for ...

Several nations boast nuclear arsenals, although nearly 90% of all nukes belong to a minority. Here's who holds the lion's ...

Since the collapse of the old Soviet Union, Russia has cut a substantially diminished figure on the international stage.

The last remaining nuclear treaty between the U.S. and Russia has expired, ending decades of arms control between the two countries with the largest nuclear arsenals.

The head of Canada's military space division says the country "should absolutely be" concerned about Russia's potential capabilities amid global fears the Kremlin is considering putting nuclear ...

Workers that build and maintain the UK's nuclear weapons have voted to strike over a planned restructuring of the ...

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger ...