Photo taken on June 18, 2019 shows the Arch of Triumph in Pyongyang, capital of the Democratic People's Republic of Korea. (Xinhua/Liu Yanxia)

Photo taken on June 18, 2019 shows the Mansudae Assembly Hall in Pyongyang, capital of the Democratic People's Republic of Korea. (Xinhua/Liu Yanxia)

Photo taken on June 18, 2019 shows the Friendship Tower in Pyongyang, capital of the Democratic People's Republic of Korea. (Xinhua/Liu Yanxia)

Photo taken on June 18, 2019 shows the Kim Il-sung Square in Pyongyang, capital of the Democratic People's Republic of Korea. (Xinhua/Liu Yanxia)