The fence in AZ is incomplete. Obama admin stopped building the fence. Miles of desert remains unfenced. Some of the fence is 3 or 4' tall posts like you see for safety in parking spaces. Posts are spaced to keep vehicles out but people walk through. In one area of the Tucson sector they have to remove a 40' portion of the fence during our monsoon season because it runs through a wash and the runoff from the rains cause flooding. Another issue is that along some of the AZ border lies a national park/preserve Cabeza Prieta that shares 56 miles of border. The feds make the Border Patrol ride horseback to patrol that area, so that they don't disturb natural desert. The border is NOT secure!