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,

Simulations created by the US Pentagon reveal the potential devastation a nuclear bomb detonated in space as Russia probes stationing weapons in space.

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.

President Donald Trump has called for the United States to test its nuclear weapons for the first time in three decades. But Trump’s statements about testing — in particular, whether other nations are still doing it — have confused experts in nuclear ...

The United States Air Force maintains a small, tightly controlled fleet of aircraft certified to deliver nuclear weapons, and the newest member of that club just passed a significant real-world test.

Eighty years ago, a weapon was used which would transform modern warfare and the entire world forever. Hiroshima, in Japan, was the target of the first ever nuclear weapon, dropped by the US Air Force on 7 August 1945 - killing more than 150,000 people in ...