A man walks past North Korean national flags in Pyongyang July 29, 2013. Former U.S. President Jimmy Carter is planning to visit North Korea soon to try to win the release of a U.S. citizen held for committing crimes against the reclusive state, South Korea's Yonhap news agency reported on Monday. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS SOCIETY) 

A foreign passenger reads The Pyongyang Times newspaper with a file photo of North Korea founder Kim Il-sung in his youth on its front page, on an Air Koryo aircraft flying towards Beijing from Pyongyang, July 29, 2013. Former U.S. President Jimmy Carter is planning to visit North Korea soon to try to win the release of a U.S. citizen held for committing crimes against the reclusive state, South Korea's Yonhap news agency reported on Monday. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS SOCIETY MEDIA) 

A foreign visitor looks out from a curtain at the entrance of a shop near a triumphal gateway in Pyongyang July 29, 2013. North Korea's economy is believed to be virtually lifeless after decades of mismanagement, isolation and sanctions aimed at foiling its nuclear ambitions but its showcase capital, Pyongyang, shows no hint of calamity. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS BUSINESS TPX IMAGES OF THE DAY) 

A North Korean woman walks at Kim Il-sung Square in Pyongyang July 29, 2013. Former U.S. President Jimmy Carter is planning to visit North Korea soon to try to win the release of a U.S. citizen held for committing crimes against the reclusive state, South Korea's Yonhap news agency reported on Monday. Picture shot through bus window. REUTERS/Jason Lee (NORTH KOREA - Tags: SOCIETY) 

Young North Koreans gesture and cheer after a celebration to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Stadium in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY TPX IMAGES OF THE DAY) 

Thousands of North Koreans attend a celebration event to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Stadium in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY) 

North Korean military officers salute as they listen to the national anthem ahead of an artistic performance to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Koreans sleep and yawn as they wait for an artistic performance to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean soldiers rest ahead of a celebration event to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Stadium in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean men perform during a celebration event to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Stadium in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY) 

Senior North Korean military officers look at the chairs vacated by their top leaders and guests after an artistic performance to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Stadium, in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

A North Korean official looks at women lifting a seat for the top leaders ahead of an artistic performance to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Stadium, in Pyongyang July 28, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY) 

Raindrops are seen on the window of a bus in front of the portraits of late North Korean leaders Kim Jong-il and Kim Il-sung (L) at the Kim Il-sung Stadium in Pyongyang July 28, 2013. North Korea is celebrating the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY) 

North Korean leader Kim Jong-un (top, 4th R) waves to soldiers and military officers during a parade to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Square in Pyongyang July 27, 2013. North Korea celebrated the 60th anniversary of the Korean War truce on Saturday with a massive military parade trumpeting the revolutionary genius of three generations of leaders that gave it "Victory in the Great Fatherland Liberation War". Picture taken July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean leader Kim Jong-un glances back at China's Vice President Li Yuanchao (2nd R) during a parade to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Square in Pyongyang July 27, 2013. Kim was joined by Li on the podium to inspect a massive throng of soldiers in goosestep and a display of weapons including its mid-range missiles. North Korea celebrated the 60th anniversary of the Korean War truce on Saturday with a military parade trumpeting the revolutionary genius of three generations of leaders that gave it "Victory in the Great Fatherland Liberation War". Picture taken July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean cadets arrive for the opening ceremony of the Victorious Fatherland Liberation War Museum, in Pyongyang July 27, 2013. North Korea is celebrating the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY) 

A North Korean official digs his nose while walking along a red carpet ahead of the opening ceremony of the Victorious Fatherland Liberation War Museum, in Pyongyang July 27, 2013. North Korea is celebrating the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY) 

A member of the North Korean military band reacts as she sits down next to a man ahead of an opening ceremony of the Victorious Fatherland Liberation War Museum, in Pyongyang July 27, 2013. North Korea is celebrating the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY) 

North Koreans and the media arrive to visit in front of a figure of North Korea founder Kim Il-sung after the opening ceremony of the Victorious Fatherland Liberation War Museum, in Pyongyang July 27, 2013, as part of celebrations of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY) 

North Korean soldiers march in a parade to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Square in Pyongyang July 27, 2013. North Korea celebrated the 60th anniversary of the Korean War truce on Saturday with a massive military parade trumpeting the revolutionary genius of three generations of leaders that gave it "Victory in the Great Fatherland Liberation War". REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY CONFLICT ANNIVERSARY) 

Fireworks are lit as part of a commemoration event to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War at the Victorious Fatherland Liberation War Memorial Tower, in Pyongyang July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

A Korean War veteran stands in front of a giant portrait of late North Korean leader Kim Il-sung after
a parade to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War at Kim Il-sung Square, in Pyongyang July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY TPX IMAGES OF THE DAY) 

Korean War veterans react as they shout slogans to North Korean leader Kim Jong-un during a parade to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War at Kim Il-sung Square, in Pyongyang July 27, 2013. North Korea celebrated the 60th anniversary of the Korean War truce on Saturday with a massive military parade trumpeting the revolutionary genius of three generations of leaders that gave it "Victory in the Great Fatherland Liberation War". REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY TPX IMAGES OF THE DAY ANNIVERSARY) 

North Korean soldiers carrying guns march to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War at Kim Il-sung Square, in Pyongyang July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

Female North Korean soldiers parade to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War at Kim Il-sung Square, in Pyongyang July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean leader Kim Jong-un waves to the people during a parade to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Square in Pyongyang July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY TPX IMAGES OF THE DAY) 

A combination photograph shows North Korean leader Kim Jong-un watching a parade to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Square in Pyongyang July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean soldiers salute as their leader Kim Jong-un (unseen) arrives for a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean students use different coloured cardboards to form portraits of late North Korean leaders Kim Jong-il and Kim Il-sung (L) as background during a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. The games are the world's biggest choreographed extravaganza, part circus act, part rhythmic gymnastics floor, with plenty of reverence for the late North Korean leader Kim Jong-il. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean students use different coloured cardboards to form a picture of a child in uniform as a background during a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. The games are the world's biggest choreographed extravaganza, part circus act, part rhythmic gymnastics floor, with plenty of reverence for the late North Korean leader Kim Jong-il. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY TPX IMAGES OF THE DAY) 

North Korean students hold different coloured cardboards, used to form a background, ahead of a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. The games are the world's biggest choreographed extravaganza, part circus act, part rhythmic gymnastics floor, with plenty of reverence for the late North Korean leader Kim Jong-il. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Korean students look out from behind coloured cardboards, used to form pictures as a background
ahead of a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. The games are the world's biggest choreographed extravaganza, part circus act, part rhythmic gymnastics floor, with plenty of reverence for the late North Korean leader Kim Jong-il. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY) 

North Koreans perform during a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY TPX IMAGES OF THE DAY) 

North Koreans perform during a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. Words read, "Devoted to the party". REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY) 

Performers take part in a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. Word (top L) reads "Victory". REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY) 

North Korean leader Kim Jong-un (C) waves as he and China's Vice President Li Yuanchao (R to Kim), President of the Presidium of the North Korea's Supreme People's Assembly Kim Yong-nam (3rd R) and Choe Ryong-hae (L to Kim), director of the General Political Bureau of the Korean People's Army (KPA), arrive for a mass gymnastic and artistic performance "Arirang", in Pyongyang July 26, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS TPX IMAGES OF THE DAY) 

A North Korean woman dressed in traditional costume is seen at the Kimilsungia-Kimjongilia exhibition hall in Pyongyang July 26, 2013. The event was held to commemorate the 60th anniversary of the signing of a truce of the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS SOCIETY ANNIVERSARY) 

A North Korean soldier takes a group photo for other soldiers next to foreign news photographers as they visit the Kimilsungia-Kimjongilia exhibition in Pyongyang July 26, 2013. The event was held to commemorate the 60th anniversary of the signing of a truce of the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY MEDIA) 

A North Korean soldier rides a bus without his uniform in Pyongyang July 26, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY) 

A painting featuring late North Korean leaders Kim Jong-il and Kim Il-sung (L) is pictured at the Kimilsungia-Kimjongilia exhibition hall, during in an event to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, in Pyongyang July 26, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY TPX IMAGES OF THE DAY) 

Portraits of late North Korean leaders Kim Jong-il and Kim Il-sung (L) are lit near a residential area at night, in Pyongyang July 25, 2013. The country is preparing to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS ANNIVERSARY) 

North Korean students visit Kumsusan Palace of the Sun, where the embalmed bodies of North Korea's founding leader Kim Il-sung and his son Kim Jong-il lie in state, in Pyongyang July 25, 2013. The country is preparing to mark the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS EDUCATION ANNIVERSARY) 

North Korean leader Kim Jong-un reacts as he arrives for the opening ceremony of the Cemetery of Fallen Fighters of the Korean People's Army (KPA) in Pyongyang July 25, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: ANNIVERSARY MILITARY POLITICS TPX IMAGES OF THE DAY) 

North Korean leader Kim Jong-un salutes as a honour guard march past as he and other top leaders attend the opening ceremony of the Cemetery of Fallen Fighters of the Korean People's Army (KPA) in Pyongyang July 25, 2013, as part of celebrations ahead of the 60th anniversary of the signing of a truce in the 1950-1953 Korean War. REUTERS/Jason Lee (NORTH KOREA - Tags: ANNIVERSARY MILITARY POLITICS) 

A North Korean airline attendant is seen on an Air Koryo aircraft flying towards Pyongyang from Beijing, July 24, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: BUSINESS EMPLOYMENT SOCIETY)