In a photo taken on May 15, 2017 people gather at a street- side newsstand showing a copy of the Rodong Sinmun newspaper featuring coverage of a May 14 North Korean rocket test, in Pyongyang The UN Security Council on May 15 strongly condemned North Korea' s latest ballistic missile test and vowed strong measures, including sanctions, to derail Pyongyang' s nuclear weapons' programme. North Korea' s long- term bid to develop a credible nuclear attack threat to the US mainland saw it launch what appeared to be its longest- range missile yet. Pyongyang said the new weapon – called the Hwasong-12 – was capable of carrying a “heavy nuclear warhead”. (Photo by Kim Won-Jin/AFP Photo)





In this May 7, 2015, photo, Kim Hyo Hua, 13, poses for a portrait at the entrance of the Pyongyang School Children's Palace in Pyongyang, North Korea. The Pyongyang School Children's Palace, which opened in 1963 is a place where talented school children go to learn extra curricular activities, and is also one of the places that tourists visit while in Pyongyang. Kim wants to be a TV presenter when she grows up. When asked what's important to them, North Koreans might talk about working hard, or doing well at sports, or having a big family, but leader Kim Jong Un is never far from the conversation. (Photo by Wong Maye-E/AP Photo)





A woman stops by a kiosk selling gifts and flowers along the streets of Pyongyang while another waits to cross the street on Friday, June 16, 2017, in North Korea. Kiosks like these are a common sight around the city, some selling food, drinks and even artificial flowers. (Photo by Wong Maye-E/AP Photo)





People watch a news broadcast on the launch of the solid-fuel Pukguksong-2 missile on a screen in front of the railway station in Pyongyang, North Korea, Monday, May 22, 2017. North Korea said it's ready to deploy and start mass-producing a new medium-range missile capable of reaching Japan and major U.S. military bases there following a test launch Sunday, May 21, 2017, it claimed confirmed the missile's combat readiness and is an “answer” to U.S. President Donald Trump's policies. (Photo by Jon Chol Jin/AP Photo)





In this Wednesday, May 27, 2009, file photo, a giant North Korean flag flutters on the top of a 160-meter (533-foot) tower in North Korea as it is pictured from the demilitarized zone (DMZ) near the border village of Panmunjom that separates the two Koreas since the Korean War, in Paju, South Korea. North Korea on Thursday, May, 25, 2017, accused South Korea of recently firing 450 rounds from machine guns at a flock of birds at the rivals’ border, dismissing as a fabrication Seoul’s claim that it fired warning shots at an object flying from the North. (Photo by Lee Jin-man/AP Photo)





Hearing-impaired dancers perform as Former NBA basketball star Dennis Rodman watches them during his visit to the Korean Federation for the Protection of Disabled on Friday, June 16, 2017, in Pyongyang, North Korea. (Photo by Kim Kwang Hyon/AP Photo)





In this Monday, April 15, 2013, file photo, a North Korean soldier guarding the entrance to Pyongyang's Kumsusan mausoleum, where the bodies of the late leaders Kim Il Sung and Kim Jong Il lie embalmed, looks back through the doors of the main gate. The death last week of American student Otto Warmbier, who fell into a coma after being arrested in North Korea, has raised questions about whether his tour agency was adequately prepared for its trips into the hard-line communist state. The Young Pioneer Tours agency built up a business attracting young travelers with cut-rate, hard-partying adventures into one of the world’s most isolated countries. (Photo by David Guttenfelder/AP Photo)





A North Korean cheerleading group wave flags to propaganda music near a road intersection as people start their day early morning on Saturday, June 17, 2017, in Pyongyang, North Korea. (Photo by Wong Maye-E/AP Photo)





Former NBA basketball star Dennis Rodman dances with school children at the Mangyongdae School Children's Palace on Thursday, June 15, 2017, in Pyongyang, North Korea. (Photo by Kim Kwang Hyon/AP Photo)





A North Korean couple row their boat on the Taedong River Sunday, June 18, 2017, in Pyongyang, North Korea. Boat rowing is one of the common outdoor activities for North Koreans to do on the river. (Photo by Wong Maye-E/AP Photo)





Staff of a boat restaurant on the Taedong River line up at the entrance as they wait to greet customers Sunday, June 18, 2017, in Pyongyang, North Korea. The boat is berthed along the river, which is the fifth longest river on the Korean Peninsula and runs through the country's capital, Pyongyang. (Photo by Wong Maye-E/AP Photo)





A girl carrying a mock rifle completes an obstacle course as school children take part in sports games marking “Children's Union Foundation day”, in Pyongyang on June 6, 2017. (Photo by Ed Jones/AFP Photo)





School children take part in a tug-of-war during sports games marking “Children's Union Foundation day”, in Pyongyang on June 6, 2017. (Photo by Ed Jones/AFP Photo)





A boy carrying a mock rifle completes an obstacle course as school children take part in sports games marking “Children's Union Foundation day”, in Pyongyang on June 6, 2017. (Photo by Ed Jones/AFP Photo)





A boy holds a mock rifle as he sits with others to take part in sports games marking “Children's Union Foundation day”, in Pyongyang on June 6, 2017. (Photo by Ed Jones/AFP Photo)





Children prepare to perform a dance routine as part of activities marking “Children' s Union Foundation day”, in Pyongyang on June 6, 2017. (Photo by Ed Jones/AFP Photo)