North Korea Has Lots of Submarines (But Just How Dangerous Are They?)
They might be old, but they can kill/.
Kyle Mizokami [2]
In 1998, a Yugo-class midget submarine, predecessor to the Yono class, was snared in the nets of a South Korean fishing boat and towed back to a naval base. Inside was a macabre sight: five submarine crewmen and four Reconnaissance Bureau agents, all dead of gunshot wounds. The crew had been murdered by the agents, who promptly committed suicide. The submarine was thought to have become entangled in the fishing boat’s net on its way back home to North Korea, after picking up a party of agents who had completed a mission ashore.
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http://nationalinterest.org/blog/the-buzz/north-korea-has-lots-submarines-just-how-dangerous-are-they-24199