Seoul says it believes North Korea fired three short-range missiles earlier this week . Short-range missile tests are common and cause less concern than longer-range ones . Comment: North Korea often fires short-range missiles during military drills . His youngest son and designated successor , Kim Jong Un , has become the new leader .
Seoul says it believes North Korea fired three short-range missiles earlier this week . Short-range missile tests are common and cause less concern than longer-range ones . Comment: His youngest son and designated successor , Kim Jong Un , has become the new leader .