China has in recent months tested a new destructive weapon that has the power to change the face of war completely.

Here’s how a nuclear bomb actually works. The B61 and the B83 nuclear bombs currently in the United States’ arsenal are thermonuclear, or hydrogen bombs, and quite different than the fission weapons ...

How are a hydrogen bomb and a regular atomic bomb different? And why would that matter to the United States and its allies? Here’s what the experts say.

But nuclear experts saw plenty of reason to doubt the country’s assertion that it had successfully detonated a hydrogen bomb — just before leader Kim Jong Un’s 33rd birthday.

An H-bomb relies on fusion, which produces energy through combining light atoms to make heavier ones.

A hydrogen bomb—the type North Korea claims it tested—is many magnitudes more powerful than an atomic bomb, which was the type dropped on Hiroshima, Japan, during World War II, killing 70,000.

In short, the hydrogen bomb is a completely different and altogether more frightening prospect and it would put North Korea into an exclusive club of only five other countries: the US, UK, China ...

The mayor of Greater Manchester calls on the government to act while the remaining survivors of the UK's 1950s nuclear tests ...

The bomb, believed buried in 10 to 15 feet of mud at the bottom of the sea, became one of 11 "Broken Arrows" — nuclear bombs lost during air or sea accidents, according to U.S. military records.