Pyongyang says it is working on a plan to simultaneously fire four ballistic missiles in an enveloping fire around Guam, a key US military stronghold that is home to US citizens, long-range bombers, military jets and submarines.

North Korean leader Kim Jong-un reacts during the long-range strategic ballistic rocket Hwasong-12 (Mars-12) test launch in May 2017.
North Korean leader Kim Jong-un reacts during the long-range strategic ballistic rocket Hwasong-12 (Mars-12) test launch in May 2017.
Source: TRTWorld and agencies