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

Nuclear weapons tests are among the most violent events humans can trigger, and that violence leaves fingerprints in the ...

In 1961, the Soviet Union detonated the largest nuclear weapon ever built, a test so powerful it sent shockwaves around the ...

The 4 to 7 percent increase in background radiation poses problems for sensitive scientific instruments. Geiger counters, ...

Opinion: This op-ed's authors argue that the president's nuclear testing comments were correct, considering America's aging ...

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 ...

Clarity is key on most issues relating to nuclear weapons, and testing them is no exception. America’s adversaries are carrying out low-level nuclear tests and gaining an advantage over the United ...

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 ...

VIENNA (AP) — The United States and Russia have both recently threatened to resume nuclear testing, alarming the international community and jeopardizing a global norm against such tests. Experts say ...

As the cloud cleared, Air Force bombers dropped in to gather air samples. Researchers hoped that the radioactive fallout ...

The history of North Korea's claimed nuclear tests. — -- Ahead of Vice President Mike Pence's trip to neighboring South Korea this weekend, tensions between the United States and North Korea ...