As I understand it, shooting down an ICBM after the first phase of flight is nearly impossible with current technology. You get it when it's launched or you pray you can get that lucky shot.
No one seems to notice that China trolled the world at the UN. They stalled (together with Russia) the application of new sanctions until very recently when they finally agreed to applying economic sanctions.
NK now has miniaturized nukes. <insert name of invisible religious deity> help us all.