Fences should also have clear zones on each side in order to enhance surveillance so a threat does not bypass or easily defeat the fencing (Garcia, XXXXXXXXXXFor example, if a tree is located in close...

Fences should also have clear zones on each side in order to enhance surveillance so a threat does not bypass or easily defeat the fencing (Garcia, 2006). For example, if a tree is located in close proximity to a fence, an adversary could use the tree as a bypass, using the tree as means to scale the fence.