Experts say there are roughly 12,241 nuclear weapons across the world, with just over 9,600 thought to be operational.

Trump's announcement breaks with more than three decades of policy. The last time the United States tested a nuclear weapon ...

Just minutes before he was scheduled to meet President Xi Jinping of China, the president threatened on social media to ...

The U.S. voluntarily halted nuclear explosive testing in 1992, though it has the ability to restart tests at a site in Nevada ...

All of the nine nuclear-armed nations are investing huge sums in new weapons. And the numbers of nuclear weapons “available ...

President Trump said Wednesday that he has instructed the Defense Department to immediately begin testing U.S. nuclear ...

North Korea is one potential villain in a fictional movie about nuclear war on Netflix, Kathryn Bigelow’s “A House of ...

The president said he was instructing the Pentagon to test the U.S. nuclear arsenal on an “equal basis” with other nuclear ...

In what would be a major shift in a decades-old American policy against global nuclear proliferation, the president says he ...

President Trump has announced plans to begin testing nuclear weapons, raising fears of a new arms race as Russia and China ...

The Kremlin’s constant nuclear boasts may have finally struck a chord in the White House, with President Donald Trump ...

The president cited Russia's recent missile tests and China's growing nuclear capabilities as the reasons behind his latest ...