Associated Press – Clues suggest North Korean sub behind warship attack

Experts say North Korea’s submarine fleet is technologically backward, prone to sinking or running aground and all but useless outside its own coastal waters. And yet many are asking: Could it have been responsible for the explosion that sank a South Korean warship in March? And if so, how could a sub have slipped through the defenses of South Korea, which, with significant American backing, maintains a fleet far more sophisticated than its northern neighbor’s?