MOSCOW (Reuters) - Russia has released previously classified footage of the world's largest nuclear explosion, caused when the Soviet Union detonated the so-called Tsar Bomba almost 60 years ago. The ...

Time For India To Test Hydrogen Bomb? Since the 1998 Pokhran-II series, India has maintained a commitment to “credible ...

SEOUL, South Korea (AP) – North Korea says it has conducted a hydrogen bomb test. The surprise announcement that complicates already difficult efforts to curb the country’s push for a working nuclear ...

SEOUL/WASHINGTON (Reuters) - North Korea on Sunday conducted its sixth and most powerful nuclear test, which it said was of an advanced hydrogen bomb for a long-range missile, prompting the threat of ...

SEOUL, South Korea (AP) North Korea said Wednesday it had conducted a powerful hydrogen bomb test, a defiant and surprising move that, if confirmed, would be a huge jump in Pyongyang's quest to ...

SEOUL, South Korea -- North Korea's declaration it had tested a hydrogen bomb for the first time was greeted with widespread condemnation -- and skepticism -- as world powers vowed Wednesday to punish ...

Richard Garwin’s role in designing the hydrogen bomb was obscured from the public, even his family, as he advised presidents and devoted his life to undoing the danger he created. Richard L. Garwin, ...