Mr. Wright said Americans in places like Nevada, where the United States has a nuclear test site bigger than the state of Rhode Island, should not expect to see a mushroom cloud.

US Energy Secretary Chris Wright clarified that the upcoming nuclear weapons tests ordered by President Trump will not involve actual nuclear explosions but only system checks.

Responding to Trump’s remarks, Chinese Foreign Ministry spokesperson Mao Ning said Beijing “has always adhered to the path of peaceful development” and follows a strict “no first use” policy when it c...