I found it interesting how they started with survival and preparedness but moved onto social/psychological issues. The external forces and stress to stay alive. I enjoyed it but would have enjoyed alittle more realism concerning living after a fallout. As far as the wireless, North Force, I believe it was a satellite system. The military has been using a system similar for some time. I did often wonder how a show that shows so many ideals contrary to current politically current ideas could even make it to tv.