(LEAD) N. Korea vows 'toughest counteraction' as long as U.S. rejects its sovereignty

(LEAD) N Korea-US SEOUL, Jan. 26 (Yonhap) -- North Korea's foreign ministry said Sunday Pyongyang should maintain "the toughest counteraction" to the United States as long as it rejects the country's sovereignty and security interests. The North's foreign ministry made the remarks as it blamed joint air drills between South Korea and the U.S., acco...