The United States said it would work with partners to impose new sanctions, and called on China to use...
It said it had mastered the ability to mount a warhead on a ballistic missile.
A seismic event may indicate that North Korea had conducted a nuclear test
Scientists found that blood readings above a certain threshold could reliably predict the probability of a patient responding
The launch attempt took place at around 5:20 a.m. Seoul time (2020 GMT)
North Korea has vowed to conduct more nuclear testing in spite of stepped-up international sanctions
"This attempt constituted a clear violation of United Nations Security Council resolutions."
"Nuclear weapons will not make Pyongyang safer. On the contrary, its costly military endeavors will keep on suffocating its economy,"...
"Dear comrade Kim Jong Un said work ... must be strengthened to improve nuclear attack capability."