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This is what most of the San Diego border looks like. The old metal runway mats are useless for stopping illegals on foot.
This is the type of fence built on about 14 miles of the San Diego border. This is the "Duncan Hunter" fence which may be built along 700 miles of the border. It is unclimbable, and is very hard to cut, allowing the USBP plenty of time to respond.
See above...
Looks like plenty of room to plant mines in the open space;>)