All of North Korea‘s three top military officials are believed to have been replaced, an intelligence source said Sunday, in a move that could be aimed at taming the military ahead of a denuclearization deal with the U.S. No Kwang-chol, first vice minister of the Ministry of People‘s Armed Forces, replaced Pak Yong-sik as defense chief, while Ri Myong-su, chief of the KPA‘s general staff, was replaced by his deputy, Ri Yong-gil, according to the source.