Russia tested a new nuclear-capable and powered cruise missile fit to confound existing defenses, inching closer to deploying it to its military, President Vladimir Putin said in remarks released on ...

I’ve grown up with rockets that burn chemical fuel, but NASA’s next big leap in propulsion could make those engines look as ...

Facing Trump’s call for a quick ceasefire and bruising, new U.S. sanctions on Russia’s oil industry, Putin is again reminding the U.S. and other Western allies of Kyiv about his nuclear arsenal to ...

Beijing has been expanding its arsenal, and distrust between China and the United States over nuclear weapons has deepened, with little hope of an agreement. By Chris Buckley When President Trump ...