The Joint Civilian-Military Investigation Group, 20 May 10: Investigation Result on the Sinking of ROKS "Cheonan"
......Based on all such relevant facts and classified analysis, we have reached the clear conclusion that ROKS "Cheonan" was sunk as the result of an external underwater explosion caused by a torpedo made in North Korea. The evidence points overwhelmingly to the conclusion that the torpedo was fired by a North Korean submarine. There is no other plausible explanation.