North Korean leader Kim Jong Un (C) and wife Ri Sol Ju visit the Kumsusan Palace of the Sun to mark the third anniversary of the death of Kim Jong Il in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang December 17, 2014. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (3rd R) 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) 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 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 (L) 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, 201. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un delivers a New Year's address in this January 1, 2015 photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) pays his respects to North Korean founder Kim Il Sung and his father Kim Jong Il at Kumsusan Palace of the Sun, in this January 1, 2015 photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) checks a book during his visit 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 (L) visits 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 (C) visits 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 (C) waves 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 (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 (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 (C) visits 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 (L) 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 (C) gives field guidance during 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) gives field guidance during his visit to 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) inspects a pair of shoes during his visit to 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) gives field guidance during his visit to 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) shakes hands with fighter pilots during a photo session 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 (L) speaks with fighter pilots during a photo session 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 (C) claps during a photo session with the participants of a meeting of military and political cadres 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) talks with officials onboard his personal plane in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 15, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) issues instructions while visiting the construction site of the Mirae Scientists Street in Pyongyang in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 15, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (front) visits the construction site of the Mirae Scientists Street in Pyongyang in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 15, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) supervises an expanded meeting of the Political Bureau of the Central Committee of the Workers' Party of Korea, under a portrait of former North Korean leader Kim Jong Il, in Pyongyang in this February 18, 2015 photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 19, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) supervises an expanded meeting of the Political Bureau of the Central Committee of the Workers' Party of Korea in Pyongyang in this February 18, 2015 photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 19, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (L) guides artillery fire and landing exercises in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 21, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (2nd L) 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 inspects the Korean People's Army (KPA) Navy Unit 164 in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 4, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (front) smiles as he gives field guidance at the construction site of Terminal 2 of Pyongyang International Airport, which is nearing completion, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 12, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un watches a men's football match between Sonbong and Hwoebul teams for the Mangyongdae Prize Sports Games at Kim Il Sung Stadium on Monday, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on April 14, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un inspects an honour guard as he visits the 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)





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





Military personnel cheer during a visit by North Korean leader Kim Jong Un to 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 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 (C) attends the 5th meeting of training officers of the Korean People's Army in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 26, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un speaks during the 5th meeting of training officers of the Korean People's Army in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang April 26, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) 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 (centre R) 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 (R) 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 visits the July 18 Cattle Farm under Korean People's Army (KPA) Unit 580, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on May 11, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un visits the July 18 Cattle Farm under Korean People's Army (KPA) Unit 580, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on May 11, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un visits the Anbyon Fish Farm under under Korean People's Army (KPA) Unit 580, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on May 11, 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 Taedonggang Terrapin Farm in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on May 19, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives field guidance at the 810 army unit’s Salmon farms in this undated photoreleased by North Korea's Korean Central News Agency (KCNA) in Pyongyang. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un visits a polling station during the election of deputies to the provincial, city and county people's assemblies in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on July 20, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un provides field guidance to the Kim Jong Thae Electric Locomotive Complex in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on July 20, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) gives field guidance to the newly built Sinchon Museum in this undated photo released by North Korea's Korean Central News Agency (KCNA) on July 23, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives field guidance to the newly built Sinchon Museum in this undated photo released by North Korea's Korean Central News Agency (KCNA) on July 23, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un visits the Kumsusan Palace of the Sun where the statues of President Kim Il Sung and leader Kim Jong Il are standing during the 62nd anniversary of the end of the Korean War in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang July 27, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives field guidance to Farm No. 1116 under the Korean People's Army (KPA) Unit 810 in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang August 13, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives field guidance to the Taedonggang Combined Fruit Farm in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang August 19, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives field guidance to the Taedonggang Combined Fruit Farm in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang August 19, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un sits in an airplane as he guides a flight drill for the inspection of airmen of the Korean People's Army (KPA) Air and Anti-Air Force in this undated file photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on October 30, 2014 file photo. His father was afraid to fly, but North Korean leader Kim Jong Un has taken to the skies, building a series of small runways long enough to land light, private aircraft next to some of his palaces, satellite imagery shows. Construction on Kim's personal landing strips began in 2014 and some were completed as recently as last month, according to satellite imagery identified by Curtis Melvin of the U.S.-Korea Institute at Johns Hopkins University in Washington. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives field guidance to the machine plant managed by Jon Tong Ryol, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on April 1, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) visits the Sinuiju Measuring Instrument Factory in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang September 4, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (C) visits the Sinuiju Measuring Instrument Factory in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang September 4, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives guidance on the field during the drive for recovery from the flood that hit Rason city in this undated picture. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (2nd L) and wife Ri Sol Ju (L) enjoy a joint performance given by the State Merited Chorus and the Moranbong Band celebrating the 70th founding anniversary of the Workers' Party of Korea in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on October 19, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un (3rd R) and wife Ri Sol Ju (4th L) enjoy an art performance given by the Chongbong Band to mark the 70th anniversary of the founding of the Workers' Party of Korea (WPK) in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on October 19, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un inspects the completed Mirae Scientists Street, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on October 21, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un inspects the completed Mirae Scientists Street, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on October 21, 2015. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un inspects the completed Mirae Scientists Street, in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on October 21, 2015. (Photo by Reuters/KCNA)