National Security Advisor H.R. McMaster of the United States, National Security Office Director Chung Eui-yong of the Republic of Korea, and Secretary General of the National Security Secretariat Shotaro Yachi of Japan held a trilateral meeting on March 17 and 18 in San Francisco to discuss the permanent denuclearization of the Korean Peninsula and the planned inter-Korean summit and United States-Democratic People’s Republic of Korea summit. The three national security advisors committed to avoiding mistakes of the past and to continue coordinating closely in the weeks ahead.