A seismic event may indicate that North Korea had conducted a nuclear test
It said it had mastered the ability to mount a warhead on a ballistic missile.
"There will be additional strong response in case of another (North Korean) nuclear test"
South Korea's military has said Pyongyang is technically ready for an additional nuclear test, depending on its leadership's...
North Korea has vowed to conduct more nuclear testing in spite of stepped-up international sanctions
The party congress is the first since 1980, before the 33-year-old Kim Jong Un was born.
The launch attempt took place at around 5:20 a.m. Seoul time (2020 GMT)
"I believe China is aware that if its strong determination is not put into actual, necessary actions, we will not be able...
"Dear comrade Kim Jong Un said work ... must be strengthened to improve nuclear attack capability."
The B-52, based in Guam and capable of carrying nuclear weapons, was flanked by two fighter planes, a U.S...