According to a "report on security strategy in Asia-Pacific" released by the U.S. Defense Department, the U.S. and puppet warmongers have conducted joint military drills several times in the waters off the Korean Peninsula under the pretext of "coping with submarine combat".

Such drills, in particular, were waged in the course of the dangerous joint military exercises such as Key Resolve.

The fact clearly proves once again that it is the U.S. and south Korean puppet forces, who are to blame for worsening the situation.