WASHINGTON — North Korean officials bragged early Wednesday morning that it conducted a hydrogen bomb test. U.S. officials are downplaying the claim. Experts say while it may not have been a ...

SEOUL, South Korea – North Korean leader Kim Jong Un inspected the loading of a hydrogen bomb into a new intercontinental ballistic missile, Pyongyang’s state media said Sunday, a claim to ...

BEIJING (Reuters) - British Foreign Secretary Philip Hammond said on Wednesday a test of a hydrogen nuclear bomb by North Korea would be a "provocation which I condemn without reservation" and a ...

Over the weekend North Korea detonated what it called a hydrogen bomb in an underground test. A hydrogen bomb has much more destructive potential than an atomic bomb-indeed, the U.S. Geological Survey ...

In northwest North Korea, Mount Mantap became the center of the country’s nuclear testing program between 2006 and 2017, when six underground detonations were carried out beneath the mountain. The ...