North Korean leader Kim Jong Un (C) smiles as a huge crowd surrounds him while he gives field guidance at the Kim Jong Suk Pyongyang Textile Mill in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang December 20, 2014. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (front C) smiles as he gives field guidance at the Kim Jong Suk Pyongyang Textile Mill in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang December 20, 2014. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) smiles as he gives field guidance at the Kim Jong Suk Pyongyang Textile Mill in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang December 20, 2014. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un has a photo session with participants in the second meeting of KPA logistic personnel in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang December 25, 2014. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (L) visits the Pyongyang Baby Home and Orphanage on New Years Day in this photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 2, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) poses for a picture with children during a visit to the Pyongyang Baby Home and Orphanage on New Year's Day in this photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 2, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) inspects the command of the Air and Anti-Air Force of the Korean People's Army (KPA) in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 13, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) inspects the command of the Air and Anti-Air Force of the Korean People's Army (KPA) in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 13, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) laughs during his visit to the Kangdong Precision Machine Plant in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 16, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un provides field guidance at Kumkop General Foodstuff Factory for Sportspersons in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 18, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un provides field guidance at Kumkop General Foodstuff Factory for Sportspersons in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 18, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) provides field guidance at Kumkop General Foodstuff Factory for Sportspersons in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 18, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un waves to a crowd as he provides field guidance to the Ryuwon Shoes Factory in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 21, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un laughs as he watch a winter river-crossing attack drill of the armored infantry sub-units of the motorized strike group in the western sector of the front of the Korean People's Army (KPA) in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 27, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (R) laughs as he watches a drill by the Korean People's Army (KPA) for hitting enemy naval target at undisclosed location in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 31, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) visits the Wonsan Shoes Factory in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang January 31, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong-un (C) smiles during a photo session with fighter pilots at the Workers' Party of Korea (WPK) Central Committee building in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 2, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un gives field guidance to the Pyongyang Cosmetics Factory in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 5, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (C) gives field guidance to the construction site of the May 27 Fishery Station in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang March 14, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un gives field guidance at a fish meal fodder factory, newly built by the Korean People's Army (KPA) in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang March 24, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (front) laughs during a visit to the Pyongyang Weak-current Machine Plant, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on April 8, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un visits Korean People's Army pilots who have completed a tour of battle sites in the area of Mt Paektu, in this undated photo released by North Korea's Korean Central News Agency (KCNA) on April 19, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un views the dawn from the summit of Mt Paektu April 18, 2015, in this photo released by North Korea's Korean Central News Agency (KCNA) on April 19, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un provides field guidance to Wonsan Baby Home and Orphanage, which is close to completion, in this photo released by North Korea's Korean Central News Agency (KCNA) on April 22, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un provides field guidance to Wonsan Baby Home and Orphanage, which is close to completion, in this photo released by North Korea's Korean Central News Agency (KCNA) on April 22, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un provides field guidance to Wonsan Baby Home and Orphanage, which is close to completion, in this photo released by North Korea's Korean Central News Agency (KCNA) on April 22, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un provides field guidance to Wonsan Baby Home and Orphanage, which is close to completion, in this photo released by North Korea's Korean Central News Agency (KCNA) on April 22, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un waves during a photo session with the participants of the Fifth Conference of the Training Officers of the KPA, in this undated photo released by North Korea's Korean Central News Agency (KCNA) May 1, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (L) provides field guidance at the newly built National Space Development General Satellite Control and Command Centre in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang May 3, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un gives field guidance to the Sinchang Fish Farm under KPA Unit 810 in this undated photo released by North Korea's Korean Central News Agency (KCNA), May 15, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un gives field guidance to the Sinchang Fish Farm under KPA Unit 810 in this undated photo released by North Korea's Korean Central News Agency (KCNA) May 15, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un (R) smiles as he plants trees with fighter pilots from Unit 447 of the Korean People's Army (KPA) Air and Anti-Air Force honoured with the title of O Jung Hup-led 7th Regiment, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang March 3, 2015. (Photo by Reuters/KCNA)

North Korean leader Kim Jong Un smiles as he attends a flight training session by female fighter pilots Jo Kum Hyang and Rim Sol in this undated photo released by North Korea's Korean Central News Agency (KCNA) on June 22, 2015. (Photo by Reuters/KCNA/Antara Foto)