Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

ANALYSTS HERE and abroad generally agreed that North Korea’s second nuclear test last week was aiming at two things – recognition of its nuclear power status by the international community, and ...

President Trump said on Thursday that the U.S. would begin testing nuclear weapons again for the first time in decades. “We’ve halted many years ago, but with others doing testing I think it’s ...

India has successfully test-fired a nuclear-capable ballistic missile, demonstrating its nuclear prowess in the wake of a recent conflict with nuclear rival Pakistan. Defense Minister Rajnath Singh ...

A subsurface atomic test near Yucca Flats, Nev., in March 1955. (U.S. Atomic Energy Commission via AP) In what would be a major shift in a decades-old American policy against global nuclear ...

In a particularly heated moment from his first term, Trump taunted North Korea’s Kim Jong Un — whose 2017 underground test is the last known example of explosive nuclear testing — for the relative ...

SEOUL, South Korea (AP) — North Korea said it conducted a “higher level” nuclear test explosion on Friday that will allow it to finally build an array of stronger, smaller and lighter nuclear weapons.

(AP) Japan’s prime minister says the world should impose tough new sanctions against North Korea if it goes ahead with plans for a nuclear test. Prime Minister Shinzo Abe told a television talk show ...

As Iran’s nuclear program advances, the critical question of whether Tehran would need to conduct nuclear tests to ensure its weapons are effective looms over the consciousness of the international ...