Paul: It's difficult to really know what NK will do since we know so little about them.  A woman born in SK, an American, wrote a book about her experience teaching in NK.  The fact she didn't get caught is simply amazing.  She's done several interviews as well as having written a book about her time in NK, 2011.  I've posted a link above but if you search her name, Suki Kim, several will come up and you can pick and choose.  It's really incredible reading.  L2g