People leave after they paid respect to former leaders Kim Il-sung (L) and Kim Jong-il at Mansu Hill in Pyongyang, North Korea, 15 April 2016. North Korea is marking the “Day of the Sun”, celebrating the day of birth of the country's founder, Kim Il-sung. The Day of the Sun is a national holiday. (Photo by Franck Robichon/EPA)





People visit the statues of North Korean founder Kim Il Sung and his son, former leader Kim Jong Il, on the anniversary of the birth of Kim Il Sung, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 15, 2016. (Photo by Reuters/KCNA)





People visit the statues of North Korean founder Kim Il Sung and his son, former leader Kim Jong Il, on the anniversary of the birth of Kim Il Sung, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 15, 2016. (Photo by Reuters/KCNA)





People take part in celebrations to commemorate the anniversary of the birth of North Korea's founding leader Kim Il Sung, at Changdok School in Pyongyang in this undated photo released by North Korea's Korean Central News Agency (KCNA) April 15, 2016. (Photo by Reuters/KCNA)





People dance on the anniversary of the birth of North Korea's founding leader Kim Il Sung in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 15, 2016. (Photo by Reuters/KCNA)





People take part in celebrations to commemorate the anniversary of the birth of North Korea's founding leader Kim Il Sung, at Changdok School in Pyongyang in this undated photo released by North Korea's Korean Central News Agency (KCNA) April 15, 2016. (Photo by Reuters/KCNA)





People visit the statues of North Korean founder Kim Il Sung and his son, former leader Kim Jong Il, on the anniversary of the birth of Kim Il Sung, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 15, 2016. (Photo by Reuters/KCNA)





Korean War veteran Jon Sun Rye, 83 years old, walks after she paid respect to former leaders Kim Il-sung and Kim Jong-il at Mansu Hill in Pyongyang, North Korea, 15 April 2016. (Photo by Franck Robichon/EPA)





Picture taken 13 April 2016 and made available 14 April 2016 shows a man cycling past the Kim Il Sung square ahead of the “Day of the Sun” celebrations in Pyongyang, North Korea. (Photo by Franck Robichon/EPA)





Young military personnel stand in front of large statues of former leaders Kim Il-sung (L) and Kim Jong-il at Mansu Hill in Pyongyang, North Korea, 15 April 2016. (Photo by Franck Robichon/EPA)





Fireworks illuminate the sky over Pyongyang to mark the birth anniversary of North Korea's founding leader Kim Il Sung in this photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 15, 2016. (Photo by Reuters/KCNA)





Fireworks illuminate the sky over Pyongyang to mark the birth anniversary of North Korea's founding leader Kim Il Sung in this photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 15, 2016. (Photo by Reuters/KCNA)