President Donald Trump announced on Wednesday that he is ordering the United States to resume nuclear testing, leaving experts wondering what this testing would entail and how it would be implemented.

There has been talk in the national security community lately about the so-called “merits” of resuming underground or even atmospheric nuclear weapons tests. I think this would be a grave mistake for ...

President Trump said on Thursday that the U.S. would begin testing nuclear weapons again for the first time in decades. “We’ve halted many years ago, but with others doing testing I think it’s ...