Leader Kim Jong Un pledged to pursue "sustained countermeasures," citing security ties between the U.S. and its regional allies.

Fears over North Korea’s plans for a nuclear test have been increasing in recent months. There was even a belief that they planned to carry one out prior to last... South Korean president Yoon ...

The nuclear-powered USS Alexandria is a 360-foot fast-attack submarine equipped with Tomahawk missiles and MK48 torpedoes.

North Korean leader Kim Jong Un has said an elevated U.S. security partnership with South Korea and Japan poses a grave ...

Here is a look at North Korea’s nuclear capabilities and the history of its weapons program. 1985 North Korea signs the Nuclear Non-Proliferation Treaty (NPT). 1993 The International Atomic Energy ...

and South Korea would coordinate their responses to a widely anticipated North Korean nuclear test—a step that... North Korea has not yet carried out a nuclear test, despite worries that it ...