朝鲜导弹潜艇近日出现异动，周日已进行了弹射试验！ austraveller2017-08-01 15:10:29

Washington (CNN)The US military has detected "highly unusual and unprecedented levels" of North Korean submarine activity and evidence of an "ejection test" in the days following Pyongyang's second intercontinental ballistic missile launch this month, a defense official told CNN on Monday.