text:  pictographs or petroglyphs but we were really kind of wondering what these confounded fences were all about and we ran into a lot of them over the years and then we finally were threatened after going into one place six times a man who had a Department of Defense ID badge confronted me about going into them and he said look I know what you've been doing in there I know where you've been and how many times you've been there he seemed to want to establish the fact that he was very certain of who we were and what we had done