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 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 (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 (front) 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) 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) gestures 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 (L) 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 (C) 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 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 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 prepares for 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 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 at the newly built Mirae Shop and Health Complex in this undated photo released by North Korea's Korean Central News Agency (KCNA) on March 28, 2016. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un visits the Paektusan Hero Youth Power Station No. 3 in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on April 23, 2016. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un has a photo session with the participants in the Seventh Congress of the WPK in this undated handout photo provided by KCNA on May 13, 2016. (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)





North Korean leader Kim Jong Un is hugged by children during his visit to Samjiyon County in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang November 28, 2016. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives guidance during his visit to Samjiyon County in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang November 28, 2016. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives field guidance during his visit to Samjiyon County in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang November 28, 2016. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un visits Samjiyon County in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang November 28, 2016. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un is hugged by children during his visit to Samjiyon County in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang November 28, 2016. (Photo by Reuters/KCNA)





North Korean leader Kim Jong Un gives guidance during his visit to various fields of Samjiyon County in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang November 28, 2016. (Photo by Reuters/KCNA)