The Hankyoreh Shinmun reports the following:
The unification ministry reported that North Korea, which is barring overland passage back to the south of workers at the Kaesong industrial complex, permitted the return of four foreigners on Saturday morning and one South Korean in the afternoon.
It will, in the event of an April launch and its subsequent conflict-arising tension , be of some bargaining value for the North to have in their custody a significant body of human shields. By cutting the military communication necessary to ensure regular overland passage, the North drew fire from all sides in the south. Its subsequent next-day backtracking has turned out to be less than full and complete. They are turning the human tap on and off.