A US official says a seismic station in Kazakhstan collected evidence of an alleged China nuclear test at Lop Nur in June ...

Meanwhile, explosions and fires were reported in Tehran and Shiraz. Satellite images show that Iran has recently built a concrete shield over a new facility at a sensitive military site and covered ...

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

Officials have ruled out earthquakes or mining as the source of a 2.75-magnitude event in 2020 near China's nuclear test site ...

The U.S. government revealed new intelligence on Tuesday suggesting China may have conducted an ...

The United States government has released fresh intelligence to buttress its allegation that China had conducted "illegal" ...

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.

A senior US State Department official has flatly rejected suggestions that Washington and Moscow are informally continuing to observe the limits of the now-expired, nuclear-weapon-limiting New START ...

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

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

Iran announced the temporary closure of the Strait of Hormuz on Tuesday for live fire drills in a rare show of force as its ...

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.