This undated picture released from North Korea's official Korean Central News Agency (KCNA) on July 6, 2014 shows North Korean leader Kim Jong-Un (C) visiting Songdowon International Children's Camp in Wonsan, Kangwon province. (Photo by AFP Photo/KCNA via KNS)

North Korean leader Kim Jong Un gives field guidance during his visit to the Songdowon International Children's Camp in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang July 6, 2014. (Photo by Reuters/KCNA)

This undated picture released from North Korea's official Korean Central News Agency (KCNA) on July 6, 2014 shows North Korean leader Kim Jong-Un (C) visiting an aquarium at the Songdowon International Children's Camp in Wonsan, Kangwon province. (Photo by AFP Photo/KCNA via KNS)

The lobby of the dormitory at the Songdowon International Children's Camp is painted in pastel colors, Tuesday, July 29, 2014, in Wonsan, North Korea. The camp, which has been operating for nearly 30 years, was originally intended mainly to deepen relations with friendly countries in the Communist or non-aligned world. But officials say they are willing to accept youth from anywhere – even the United States. (Photo by Wong Maye-E/AP Photo)

North Korean school girls stand in formation during an opening ceremony for the start of summer activities at the Songdowon International Children's Camp, Tuesday, July 29, 2014, in Wonsan, North Korea. (Photo by Wong Maye-E/AP Photo)

Students from various countries sunbathe, swim and relax at the Songdowon beach, just in front of the Songdowon International Children's Camp compound, Tuesday, July 29, 2014 in Wonsan, North Korea. (Photo by Wong Maye-E/AP Photo)

Young North Korean girls hold up signboards with the names of participating countries during an opening ceremony at the Songdowon International Children's Camp, Tuesday, July 29, 2014, in Wonsan, North Korea. (Photo by Wong Maye-E/AP Photo)

Kim Sun Gun, 12, of North Korea, center, smiles as he watches other students bury Russian student Konstantin Kostya, 10, in the sand at the Songdowon International Children's Camp, Tuesday, July 29, 2014, in Wonsan, North Korea. (Photo by Wong Maye-E/AP Photo)

Students from the Laureat International School in Tanzania walk past a statue of the late North Korean leaders Kim Il Sung and Kim Jong Il, surrounded by children, on the parade square of the Songdowon International Children's Camp, Tuesday, July 29, 2014, in Wonsan, North Korea. (Photo by Wong Maye-E/AP Photo)

North Korean girls in similar bathing suits stand under a shower at the Songdowon International Children's Camp, Tuesday, July 29, 2014, in Wonsan, North Korea. (Photo by Wong Maye-E/AP Photo)