North Korea has its own military and technical reason to carry out another nuclear test, as it needs a miniaturized nuclear warhead to be loaded on its newly developed missiles, a former senior South Korean defense official said Wednesday. “North Korea’s level of nuclear (warhead) miniaturization is estimated to be around 60 centimeters in diameter,” Kim Jung-sup, a senior research fellow at the Sejong Institute who served as deputy defense minister, said at a forum in Seoul. – Yonhap News Photo: KCYV