Despite Iran’s three main nuclear facilities remaining inoperative, images show visible work underway. Iran seems to have ...

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

The negotiations over Tehran’s nuclear capabilities come against a backdrop of deadly protests inside Iran and a buildup of U ...

U.S. and Iranian officials meet separately in Oman for indirect nuclear talks, with diplomats reportedly preparing conditions ...

The last major nuclear arms control treaty between Russia and the United States expires on Thursday, ushering in an era ...

Repairs at key missile sites began soon after they were hit by Israeli and U.S. strikes last year, but work at Iran’s nuclear ...

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

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

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

The U.S. is seeking "zero nuclear capability" from Iran, the White House said.

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

Iran and the United States are poised Friday to hold negotiations in Oman at least over Tehran’s nuclear program ...