U.S. military drills and vowed a rapid expansion of his nuclear forces to counter rivals, state media said Tuesday, as he inspected his most advanced warship being fitted with nuclear-capable systems.

South Korea will review an agreement with Westinghouse Electric Co. to resolve a nuclear power intellectual property dispute after local media reported the deal’s potentially unfavorable terms.

North Korean leader Kim Jong Un said a U.S.-South Korea joint military exercise could "ignite a war" and called for the rapid expansion of Pyongyang's nuclear capabilities.