Energy Secretary Chris Wright says that new tests of the U.S. nuclear weapons system ordered up by President Donald Trump ...

Energy Secretary Chris Wright says that new tests of the U.S. nuclear weapons system ordered up by President Trump will not ...

The U.S. has an estimated 200 tactical nuclear weapons, with roughly half deployed in Europe. The U.S. is believed to have ...

Touting new weapons tests, Moscow signals to Washington that it must contend with the Kremlin’s power and negotiate.

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

Iran’s foreign minister accused U.S. President Donald Trump of hypocrisy over his decision to restart nuclear weapons testing ...

President Donald Trump and Chinese President Xi Jinping met for their first face-to-face talks in six years in South Korea.

Trump orders immediate resumption of U.S. nuclear weapons testing to match global programs, citing Russia and China's ...

Russia responded to Trump’s post by underscoring that it did not test its nuclear weapons and has abided by a global ban on ...

NBC News’ Andrea Mitchell joins “Here’s the Scoop” co-host Yasmin Vossoughian to explain the difference between a weapons ...

Dmitri S. Peskov, a Kremlin spokesman, told Russian news agencies that recent drone and missile tests were not nuclear ...

Questions have arisen after Russian President Vladimir Putin said his country tested two nuclear-capable weapons this week.