Russia has repeatedly struck Ukraine's energy infrastructure, risking a nuclear disaster.

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

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

The treaty between the U.S. and Russia limiting their deployment of strategic nuclear weapons has expired, leaving plenty of ...

The U.S. on Friday called for a new, broader nuclear arms control treaty with China and Russia after it accused Beijing of ...

The real problem with New START, in Trump’s eyes, was the same problem that compelled him to denounce the Iran nuclear deal ...

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

It is 85 seconds to midnight on the Doomsday Clock in Chicago and, amid multiple conflicts in West Asia and in Ukraine, ...

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

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

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

For the first time in nearly a half-century, the United States and Russia don't have any restraints on their arsenals.