The White House says the U.S. government's early analysis of underground activity in North Korea "is not consistent" with that country's claim of having conducted a successful hydrogen bomb test.

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 ...

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 ...

North Korea released a statement early Wednesday asserting that they have successfully tested a hydrogen bomb, “a measure for self-defence the DPRK has taken to firmly protect the sovereignty of the ...

New Delhi: A major revolution in the arms race came when America invented the atomic bomb. The devastation caused by this weapon in Hiroshima and Nagasaki in Japan shocked the entire world, though it ...

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 ...

The People’s Republic of China has reportedly developed a new weapon of mass destruction, one that employs hydrogen fuel, yet isn’t nuclear. The new two-kilogram bomb may seem small, but a controlled ...