However, what they CAN do is time a transpacific launch of a Taepodong-2 at the same time the Shuttle returns, for PR effect--the same day, same hour, what not.
NK has a good location to disrupt a shuttle landing. While the big-sky-small-plane theory minimizes the chances of a direct missile strike, the possibility still exists and should be addressed by NASA. Also, what if NK intentionally destroys a missile to "shotgun" the flight path of a shuttle? What if they decide to test their first nuke on a missile launched "close enough"?
Just how mad is NK's dictator?