Walls don’t work. You need to understand that construction of a wall in our current climate is only the first step. When the wall is breached and proved to be ineffective what is to follow? Guard towers with machine guns? Mine fields? A DMZ perhaps? Maybe a five mile wide buffer zone might work. These tactics have been tried before and do not work. The lead photo, “Walls Don’t Work“; China 1935 shows a debris field as Japanese forces breached the Great Wall.