A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground ...

State Department alleges China conducted nuclear test in 2020, reigniting debate over U.S. testing moratorium and ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

A U.S. official revealed details of an alleged Chinese nuclear test, urging global cooperation for disarmament while ...

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

In the midst of trading promises with both allies and adversaries during his recent tour of Asia, U.S. President Donald Trump dampened the positive mood with an ominous pronouncement. “Because of ...

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

Confusion and ambiguity are dangerous in nuclear brinksmanship. President Donald Trump spread both on Wednesday when he ...

Jay Cowan still worries about the Rulison blast’s proximity to the Colorado River and expresses disbelief at the 107 days that radioactive gas was burned in order to test whether the radionuclides ...

WEST PALM BEACH, Fla. (AP) — New tests of the U.S. nuclear weapons system ordered up by President Donald Trump will not include nuclear explosions, Energy Secretary Chris Wright said Sunday. It was ...

A Trump administration official said that a remote seismic station in Kazakhstan measured an “explosion” in western China on ...