North Korea has developed a new type of midget submarine fitted with torpedo launch tubes, allowing it to attack South Korea warships more easily, a report said Tuesday. Satellite images of a naval base in the North's southwestern city of Nampo, published by JoongAng Ilbo newspaper, show what appears to be a 17-metre-long (56-feet) submarine with a tube-like structure attached to its top. "We have concluded that it is a torpedo launch tube," the paper quoted an unidentified Seoul intelligence source as saying. The paper said the new Daedong-B midget submarine moves faster than larger submarines and is harder for...