On Nov. 13, 1972, Terry Christensen was working in his office at Dixon Inc. on Orchard Mesa when he, like others, “felt the tremor.” He added. “We went out and saw the smoke. We saw a mushroom cloud, ...

Nuclear weapons tests are among the most violent events humans can trigger, and that violence leaves fingerprints in the Earth, sea, air, and even in orbit. The physics of shock waves, sound, and ...

When Iran’s covert nuclear program came to international attention over two decades ago, Tehran insisted that its intentions were peaceful and that it had no plans to develop nuclear weapons.

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 ...

President Donald Trump ordered the Department of War to resume testing nuclear weapons “on an equal basis” with Russia and China on Thursday, a practice halted by the U.S. in 1992. The announcement ...