For South Korea, good news came early out of President Moon Jae In's landmark visit to Pyongyang. On Sept. 18, Moon and North Korean leader Kim Jong Un, along with their respective defense ministers, signed the September Pyongyang Joint Declaration.
The statement included two North Korean pledges related to denuclearization. The country pledged to permanently shut down the missile-engine testing facility and missile launchpad at Tongchang-ri with the presence of experts from "related countries." North Korea also said it would take further steps, including the permanent closure of the Yongbyon nuclear facility if the United States takes corresponding steps....