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

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

If nothing replaces the New START nuclear arms treaty, security analysts see a more dangerous environment with a higher risk ...

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 US accused China Wednesday of conducting at least one secret nuclear test as Washington continued its push for a new arms ...

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

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.

The New Strategic Arms Reduction Treaty expired recently --- freeing the US and Russia from all major nuclear restraints.

In the midst of trading promises with both allies and adversaries during his recent tour of Asia, U.S. President Donald Trump dampened the positive mood with an ominous pronouncement. “Because of ...

Warning at an appearance in Las Vegas that the world is “less safe” without a binding nuclear pact, two key House Democrats ...

DUBAI, United Arab Emirates(AP) — President Donald Trump's comments Thursday suggesting the United States will restart its testing of nuclear weapons upends decades of American policy in regards to ...

A strong 5.2 quake rattling the ground near Iran’s Bushehr nuclear plant would be alarming in any week. Coming just as Washington and Tehran edge toward a direct clash over nuclear sites, it has ...