Just minutes before he was scheduled to meet President Xi Jinping of China, the president threatened on social media to resume nuclear testing “on an equal basis” with other countries. By David E.

President Trump's comments about restarting weapons tests are not likely to lead to mushroom-cloud explosions over the New Mexico desert or seismic shaking underground in Nevada, according to the ...

Aerojet, a GenCorp (NYSE: GY) company, in conjunction with Lockheed Martin and NASA, successfully completed vibration and hot fire acceptance testing on its first development MR-104G mono-propellant ...

Add Yahoo as a preferred source to see more of our stories on Google. Russian President Vladimir Putin has instructed his government to submit proposals on the possible resumption of nuclear weapons ...

President Trump and one of his top cabinet officials are sending mixed messages on how the U.S. government is handling the most destructive weapons in the world. By David E. Sanger and Zolan ...

Russian President Vladimir Putin has instructed his government to submit proposals on the possible resumption of nuclear weapons testing in response to President Trump instructing the Pentagon to do ...