SEOUL, Nov 27 — 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.

SYDNEY, Oct 31 — The United States is planning to deploy up to six nuclear-capable B-52 bombers to an air base in northern Australia, a source familiar with the matter said on Monday, amid heightened tensions with China.