North Korea is barred under UN Security Council resolutions from launching rockets as that technology can also be used to launch ballistic missiles. Kim, however, declared this month that its space program "can never be abandoned."
    
North Korea has been upgrading the Sohae launch site on its west coast since mid-2013 after it blasted its first rocket into space in December 2012. It says the space program is peaceful.
    
The US-Korea Institute at Johns Hopkins School of Advanced International Studies says the North completed an expansion of its launch tower late last year to take larger rockets. Commercial satellite imagery shows that since then, the North has been working on a support building and what appears to be a moveable platform to allow an assembled rocket to be shifted on rails to the launch pad.
    
The institute likens it to facilities in China but says there's no publicly available evidence to suggest Beijing is providing help.

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