Clean energy from nuclear fusion may soon be commercial. But leaders around the world have done little to prepare.

On July 16, 1945, at 5:29 a.m. Mountain War Time, humanity entered the nuclear age with a blinding flash of light in the New Mexico desert. The Trinity test, conducted in the Jornada del Muerto desert ...

Here’s how a nuclear bomb actually works. The B61 and the B83 nuclear bombs currently in the United States’ arsenal are thermonuclear, or hydrogen bombs, and quite different than the fission weapons ...

Iran entered into a nuclear deal under Obama administration Dating back to 1995, the U.S. put trade and oil sanctions on Iran, accusing the leadership of seeking nuclear weapons, among other things.

Israeli sources tell WaPo killing of top scientists halted development of EMP device, complex nuclear fusion warhead; half of ...

Nine countries currently either say they have nuclear weapons or are believed to possess them. The first to have nuclear arms were the five original nuclear weapons states — the United States ...