North Korea's Kim vows to keep his nuclear force ready for combat with US

North Korean leader Kim Jong Un vowed to redouble efforts to make his nuclear force fully ready for combat with the United States and its allies, state media reported Tuesday, after the country disclosed a new platform likely designed to fire more powerful intercontinental ballistic missiles targeting the mainland U.S.

Kim has repeatedly made similar pledges, but his latest threat comes as outside experts believe Kim will perform provocative weapons tests ahead of the U.S. presidential election in November. In recent days, North Korea has also resumed launches of trash-carrying balloons toward South Korea.

In a speech marking the 76th founding anniversary for his government on Monday, Kim said North Korea faces a grave threat because of what he called the reckless expansion of a U.S.-led regional military bloc that is now developing into a nuclear-based one. Kim said such a development is pushing North Korea to boost its military capability, according to the official Korean Central .