There has not been a major (or minor) nuclear explosion since the 1960s. This is almost entirely because ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

The United States is ready to carry out low-yield nuclear tests to match alleged secret explosions by China and Russia, ending a decades-old moratorium, a senior official said Tuesday. New START, the ...

Israeli airstrikes on Iran is Tehran’s intentions with its nuclear program. Here’s a breakdown on what’s known about Iran’s nuclear potential.

Decades after the fall of the Berlin Wall, the Pentagon realized that deploying megaton-yield gravity bombs over Europe the highest level nuclear weapon in US inventory was not just unlikely, but ...

US intelligence sources say China is rapidly bringing its nuclear weapons stockpile at par with Russia and the United States.

The previous chapters present the results of the work carried out to address the committee’s charge, including a literature review, calculations, and analysis of information presented by many experts.

North Korea warned this week that it might test a hydrogen bomb in the Pacific Ocean, after saying the country had already successfully detonated one. A hydrogen bomb has never be ...

Add Yahoo as a preferred source to see more of our stories on Google. The massive "Ivy Mike" US nuclear test of November 1952 in Elugelab Island in the Marshall Islands, seen in a 2002 US Department ...