Confusion and ambiguity are dangerous in nuclear brinksmanship. President Donald Trump spread both on Wednesday when he posted on Truth Social an error-filled and unclear order for the U.S. to “immediately” resume nuclear weapons tests. Trump’s message was sent just before his meeting with Chinese President Xi Jinping in Busan, South Korea.

Experts say Trump's direction for the U.S. to resume nuclear testing is dangerous to populations and would open a door for adversaries to sharpen their weapons.

The U.S. will immediately begin testing nuclear weapons, President Donald Trump said in a post on Truth Social Wednesday night. Trump said he has ordered the Department of Defense to begin testing because of other nations' nuclear programs.

With trials of atomic weapons set to resume, we recall the environmental and health damage wrought by such testing

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

President Donald Trump’s comments Thursday suggesting the United States will restart its testing of nuclear weapons upends decades of