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 completely transform its nuclear arsenal into the world’s most technologically advanced,

A Trump administration official said that a remote seismic station in Kazakhstan measured an “explosion” in western China on June 22, 2020. China denies conducting a test.

Facilities undergoing modernization have been observed in Sichuan Province, potentially indicating testing related to atomic weapons.

This area, known as Lop Nur, or Lop Lake, is often likened by defence experts to Area 51, the fabled compound where the US tests its most classified and cutting-edge aircraft. Isolated and tightly controlled, Lop Nur is where the United States government has alleged that China has been conducting hidden nuclear explosive tests.

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

Under a proposed nuclear deal with the United States, Saudi Arabia could gain uranium‑enrichment capabilities and come closer to developing a nuclear weapon — prompting a nuclear arms race in West Asia amid surging US‑Iran tensions.

The expiration of the New START treaty last week -- long the framework limiting both nations to 1,550 warheads in 700 launchers -- has renewed fears of an emerging nuclear arms race.

The administration seems to think that when it comes to nuclear weapons, more is better. With New START gone, the Navy is studying whether to reopen disabled launch tubes on Ohio-class submarines and load additional warheads on its intercontinental ballistic missiles.

The Pantex Plant and the Department of Energy’s National Nuclear Security Administration have completed the Last Production Unit of the W88 Alteration 370 nuclear warhead, concluding a major modernization program centered at the Amarillo-area facility ...

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

Iran reports progress in Geneva and will propose terms to the US, as both sides weigh military signals and diplomacy.