Trucks transport what appear to be North Korea's Musudan intermediate-range ballistic missiles at a military parade in Pyongyang on October 10, 2010.
Trucks transport what appear to be North Korea's Musudan intermediate-range ballistic missiles at a military parade in Pyongyang on October 10, 2010.
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A North Korean soldier stands guard in front of a military vehicle carrying what is believed to be a Taepodong-class missile during a military parade to mark the 100th birthday of the country's founder Kim Il Sung in Pyongyang on April 15, 2012.
A North Korean soldier stands guard in front of a military vehicle carrying what is believed to be a Taepodong-class missile during a military parade to mark the 100th birthday of the country's founder Kim Il Sung in Pyongyang on April 15, 2012.
PEDRO UGARTE/AFP/Getty Images
At a parade in Pyongyang in July 2013, North Korea shows off the KN-08, which it claims are road-mobile intercontinental ballistic missiles.
At a parade in Pyongyang in July 2013, North Korea shows off the KN-08, which it claims are road-mobile intercontinental ballistic missiles.
Kyodo News via Getty Images
A North Korean Taepodong-class missile is displayed during a military parade past Kim Il Sung square marking the 60th anniversary of the Korean war armistice in Pyongyang on July 27, 2013.
A North Korean Taepodong-class missile is displayed during a military parade past Kim Il Sung square marking the 60th anniversary of the Korean war armistice in Pyongyang on July 27, 2013.
ED JONES/AFP/Getty Images
North Korean rocket launchers pass through Kim Il Sung square during a July 2013 military parade.
North Korean rocket launchers pass through Kim Il Sung square during a July 2013 military parade.
ED JONES/AFP/Getty Images
Trucks carrying what are believed to be KN-08 ballistic missiles in a July 2013 military parade.
Trucks carrying what are believed to be KN-08 ballistic missiles in a July 2013 military parade.
Kyodo News via Getty Images
A KN-14 intercontinental ballistic missile is seen in a military parade at Pyongyang's Kim Il Sung Square in October 2015.
A KN-14 intercontinental ballistic missile is seen in a military parade at Pyongyang's Kim Il Sung Square in October 2015.
Kyodo News via Getty Images
North Korean mobile rocket launchers are displayed during a mass military parade at Kim Il Sung square in Pyongyang on October 10, 2015.
North Korean mobile rocket launchers are displayed during a mass military parade at Kim Il Sung square in Pyongyang on October 10, 2015.
ED JONES/AFP/Getty Images