By Josh Smith SEOUL (Reuters) -North Korean leader Kim Jong Un said his country’s ultimate goal is to possess the world’s most powerful nuclear force, as he promoted dozens of military officers involved in the recent launch of North Korea’s largest ballistic missile, state media reported on Sunday. The announcement comes after Kim inspected a test of the country’s new Hwasong-17 intercontinental ballistic missile (ICBM), and pledged to counter U.S. nuclear threats with nuclear weapons on Nov. 18. Building the nuclear force is for reliably protecting the dignity and sovereignty of the state and…