A senior State Department official on Tuesday said the U.S. still is assessing how to implement President Donald Trump's ...

In the wake of U.S. President Donald Trump’s suggestion earlier this year that the U.S. would resume nuclear testing, a U.S. government representative defended the stance at a global nuclear arms ...

Add Yahoo as a preferred source to see more of our stories on Google. People perform for North Korean leader Kim Jong Un during a celebration for nuclear scientists and engineers who contributed to a ...

VIENNA (AP) — The United States and Russia have both recently threatened to resume nuclear testing, alarming the international community and jeopardizing a global norm against such tests. Experts say ...

WASHINGTON, March 24 (Reuters) - A senior State Department official on Tuesday said that the U.S. still is assessing how to implement President Donald Trump's order to resume U.S. nuclear weapons ...

President Donald Trump issued a directive in October to conduct nuclear weapons tests.

The U.S. deliberates on resuming nuclear weapons tests under Trump's directive, potentially destabilizing global ...

Discover the dramatic story behind the Tsar Bomba, the largest nuclear weapon ever detonated. This video explores its Cold ...

MOSCOW (AP) — Russian and U.S. negotiators discussed the expiration of the last remaining nuclear arms pact between the two countries and agreed on the need to quickly launch new arms control talks, ...

A senior State Department official on Tuesday said the U.S. still is assessing how to implement President Donald Trump's ...

The Navy admiral who ‌commands U.S. nuclear forces on Thursday endorsed a finding by the Energy Department and Pentagon that ...