Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald Trump vows to restart U.S. tests.

Right now, there are over 400 nuclear power plants operating in 20 countries. Could they be ticking time bombs? Possibly rendering their areas uninhabitable as a result of a nuclear explosion? What if ...

WASHINGTON — The United States is ready to carry out low-yield nuclear tests to match alleged secret explosions by China and ...

A top arms diplomat at the State Department recently laid out what might come next as Washington upends decades of federal policies on nuclear proliferation.

At a event in Washington D.C., A U.S. official said a remote earthquake in 2020 was caused by a Chinese nuclear test.

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

Six hours into a routine patrol mission over the Arctic, smoke began filling the cockpit of a B-52 Stratofortress carrying four hydrogen bombs. Captain John Haug and his crew fought to reach Thule Air ...

U.S. envoys Steve Witkoff and Jared Kushner are also responsible for Russia-Ukraine talks nearby, so they may be shuttling ...

The U.S. Department of War airlifted a five-megawatt nuclear reactor built by Valar Atomics from California to Hill Air Force ...

Just as the talks got underway in Geneva, Iranian state media reported that parts of the strategic Strait of Hormuz will close while Iran’s Revolutionary Guard conducts military drills.

The second round of talks in Geneva about Iran's nuclear program takes place as the United States ramps up its military presence in the Middle East and Iran holds large-scale maritime exercises.