The test likely pushed Pyongyang's scientists and engineers closer to their goal of building a warhead small enough to place on a missile that can reach the U.S. mainland. But South Korea's spy agency ...

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 ...

President Donald Trump ordered the Department of War to resume testing nuclear weapons “on an equal basis” with Russia and China on Thursday, a practice halted by the U.S. in 1992. The announcement ...

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 — North Korea’s declaration that it had tested a hydrogen bomb for the first time was greeted with widespread condemnation — but also skepticism — as world powers vowed Wednesday to ...

"If confirmed, this action would represent a grave violation of (North Korea's) international obligations not to produce or test nuclear weapons, as determined by several United Nations Security ...