(UPDATE) SEOUL — North Korean leader Kim Jong Un said his previous negotiations with the United States only upheld Washington's "unchangeable" hostility toward Pyongyang, and described his nuclear buildup as the only way to counter external threats, state media said Friday.
Kim spoke Thursday at a defense exhibition where North Korea displayed some of its most powerful weapons systems, including intercontinental ballistic missiles designed to target the US mainland, the North's Korean Central News Agency said.
