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 ...

SEOUL, South Korea — 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, South Korea — The White House said today that initial data from its monitoring stations in Asia were “not consistent” with North Korea’s claim that the nuclear test it carried out earlier in ...

SEOUL, South Korea (AP) — 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 ...

SEOUL, South Korea (AP) — 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 ...

A Handley Page Hastings (TG 582) flying over London, Christmas Island (now Kiritimati), Line Islands, in August 1956, at the time of the British H-bomb test. The United Kingdom’s secretary of state ...