The “massive attacks” have caused power outages across Ukraine, the country’s state grid operator said on Saturday. Ukrainian ...

Without the New START treaty, which caps the number of deployed nuclear warheads at 1,550 on each side, there will be no ...

There are still strong incentives to negotiate reductions in nuclear arsenals between the United States, Russia, and China.

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

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

The New START treaty terminated Thursday, leaving no caps on the two largest atomic arsenals for the first time in more than ...

Top U.S. nuclear official accuses China of conducting a secret nuclear test in 2020 and confirms plans to restart U.S.

The Kremlin says Russian and U.S. negotiators have discussed the expiration of their last remaining nuclear arms pact ...

By Tom Balmforth, Gram Slattery, Erin Banco and John Irish KYIV, Feb 6 (Reuters) - U.S. and Ukrainian negotiators have ...

The Kremlin said Thursday it regretted the expiration of the last remaining nuclear arms pact between Russia and the United ...

Successive administrations, both Democratic and Republican, went about it in the same basic way: signing deals with Russia ...

Russian and U.S. negotiators discussed the expiration of the last remaining nuclear arms pact between the two countries and ...