(3rd LD) N.K. leader hails SLBM launch as success, boasts of nuke attack capability
(ATTN: REWRITES headline; UPDATES with more info throughout; ADDS photos)By Kim Soo-yeon
SEOUL, Aug. 25 (Yonhap) -- North Korean leader Kim Jong-un has called the North's launch of a ballistic missile from a submarine "the greatest success," saying