SEOUL, South Korea — Soon after the ground shook around its nuclear testing facility, North Korea trumpeted its first hydrogen bomb test — a powerful, self-proclaimed "H-bomb of justice" that would ...

President Park Geun-Hye hastily convened an emergency national security council meeting as soon as news of the test broke and promised a tough response. "The test is not only a grave provocation to ...

The Alaska Earthquake Center says its equipment picked up seismic activity after North Korea's claimed detonation of a hydrogen bomb Tuesday. But the seismic reaction is almost the same as the seismic ...

Richard Garwin, who has died aged 97, was an American nuclear scientist who designed the world’s first hydrogen bomb and went on to become a presidential adviser on arms control, while helping to lay ...

TOKYO — The announcement Wednesday from North Korea that it had carried out a nuclear test brought to the front lines of global attention a phrase not often heard since the Cold War — "the H-bomb." As ...

Richard L. Garwin, an architect of America’s hydrogen bomb, who shaped defense policies for postwar governments and laid the groundwork for insights into the structure of the universe as well as for ...

Here’s What You Need to Know: Skies were clear, and the modified U-2Gs preformed well, snapping photos of the French test site without being detected. They snapped photos of the day... Here’s What You ...

TOKYO (AP) — North Korea says it successfully detonated a hydrogen bomb in its latest nuclear test Sunday. Outside experts haven't been able to verify that claim, but say it's plausible. If true, it ...