A simulated nuclear warhead on a ground-to-ground tactical ballistic missile is detonated over the target islet off the city of Kim Chaek, North Hamgyong Province, March 27, after being launched from Ryokpo District in Pyongyang, as a missile unit of North Korea conducted a demonstration firing drill with a nuclear air explosion striking mode by two ground-to-ground tactical ballistic missiles, in this photo released by the North's official Korean Central News Agency. Yonhap |