North Korea's Foreign Minister Ri looks at an air raid siren, that was used in Hanoi during the Vietnam War, during his visit to the Hanoi Museum in Hanoi

North Korea’s Foreign Minister Ri looks at an air raid siren, that was used in Hanoi during the Vietnam War, during his visit to the Hanoi Museum in Hanoi

North Korea's Foreign Minister Ri Su (R)Yong looks at an air raid siren, that was used in Hanoi during the Vietnam War, during his visit to the Hanoi Museum in Hanoi, August 7, 2014. REUTERS/Hoang Dinh Nam/Pool (VIETNAM - Tags: POLITICS) - RTR41IJ2

March 30, 2017 1:53 PM (UTC+8)