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

Beijing urged the U.S. and Russia to act soon, saying the global nuclear order was on the line.

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

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

The president has said a new nuclear pact should involve Beijing.

Independent estimates clearly show that the US and Russia possess the largest nuclear arsenals, each having an inventory of ...

The New Start Treaty will expire Thursday, removing limits on the U.S. and Russia's arsenals for the first time in over 50 ...

A BOMBSHELL ACCUSATION: When President Donald Trump announced last October that he was ordering the Pentagon to “immediately” start testing nuclear weapons on an equal basis,” with “other countries” ...

The new U.S. accusations about China's nuclear weapons development come at a very turbulent moment for nuclear arms control globally.

The U.S. State Department accused the Chinese government on Friday of conducting a secret nuclear test in 2020, while the ...

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 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.