SEOUL, South Korea (AP) — A North Korean mid-range ballistic missile apparently failed shortly after launch Saturday, South Korea and the United States said, the third test-fire flop just this month but a clear message of defiance as a U.S. supercarrier conducts drills in nearby waters. The North fired the same type of missile April 16, just a day after a massive military parade where it showed off its expanding missile arsenal, but U.S.