An eyewitness account of the first atomic bomb tests in the Marshall Islands, along with some remarkably prescient observations about what they could mean for future superpower rivalries.

The Castle Bravo nuclear test produced an explosive yield of 15 megatons and was 1,000 times more powerful than the bomb that destroyed Hiroshima.

Should the U.S. and Russia resume nuclear testing? The answer to that question must be a resounding “No.” Yet President Donald Trump and Russian leader Vladimir Putin, eager to project strength, have ...

The U.S. successfully tested a tactical thermonuclear gravity bomb using inert warheads in August, according to a research and development arm of the Department of Energy's (DoE) National Nuclear ...