August 29 marks the anniversary of the first nuclear test at the Soviet Union’s Semipalatinsk test site in modern-day Kazakhstan—and also its closure. August 29 is the United Nations’ International ...

A photograph from the dismantling of the Punggye-ri nuclear test site in May 2018. (Handout/Getty Images) When you gaze into ...

UN chief António Guterres urged nuclear states to uphold testing moratoria and ratify the CTBT as the world marked the International Day Against Nuclear Tests.

President Donald Trump on Wednesday said he had directed the Pentagon to begin testing nuclear weapons “on an equal basis” with Russia and China, triggering uncertainty over the decades-old U.S.

Explainer-Nuclear Testing: Why Did It Stop, Why Test and Who Has Nuclear Weapons? By Guy Faulconbridge (Reuters) -U.S. President Donald Trump ordered the U.S. military on Thursday to immediately ...

The world passed a nuclear milestone this week. And, perhaps surprisingly given the recent run of saber-rattling from the likes of Russia and the United States, it’s a positive one. “As of today, the ...

MAJURO, MARSHALL ISLANDS — Lemeyo Abon learned about snow from the movies played on projectors by visiting American sailors. But living on Rongelap — a remote tropical atoll in the central Pacific ...

North Korea’s six underground nuclear tests may have done more than produce short-lived tremors.

Add Yahoo as a preferred source to see more of our stories on Google. A subsurface atomic test near Yucca Flats, Nev., in March 1955. (U.S. Atomic Energy Commission via AP) (U.S. Atomic Energy ...

Late last week, the U.S. leveled an explosive claim: China is planning secret nuclear weapons tests and has already conducted at least one. China denied the allegations, but experts are worried that ...

WASHINGTON — Democratic senators representing states that bore the brunt of the fallout from explosive nuclear weapons testing are seeking to pass legislation that would bar President Donald Trump ...