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

Nuclear bombs do not rely on size, they rely on physics. Here is how chain reactions and hydrogen bombs unleash power on a city-ending scale.

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 ...

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 ...

President Donald Trump’s recent call to resume U.S. nuclear weapons testing “on an equal basis” with Russia and China has reignited a decadesold debate about America’s nuclear posture and global ...

In the wake of U.S. President Donald Trump’s suggestion earlier this year that the U.S. would resume nuclear testing, a U.S. government representative defended the stance at a global nuclear arms ...

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 ...