1.   A hidden fence may protect a dog that is prone to roam, but it does not necessarily protect strangers approaching the yard.

2.   Game ranchers, meanwhile, are arguing that high fences protect habitat and help preserve it from encroaching development.

3.   A barbed wired perimeter fence partially protects the mobile homes, but does not completely surround them.

4.   On the outskirts, the only options are crossing small, electricity-producing dams, protected by fences, or getting in the water.

5.   The security fences protect troops and help ensure a U.S. presence in the hazardous, oil-rich region.