Pyongyang test-launches strategic cruise missiles from submarine The DPRK's General Directorate of Missile Science conducted a test launch of two types of strategic cruise missiles from a submarine in the Sea of Japan on Wednesday, the Korean Central News Agency (KCNA) reports. "The launch of the test contributed to testing the constant combat readiness of underwater combat systems and testing the ability to carry out strategic missions of the Navy, and also proved the high security, reliability and power of North Korea's war deterrent," the statement said.