The Border Patrol, which is part of CBP, uses a “digital wall” comprising eight thousand cameras to monitor our southern border and ports of entries, and employs 18,500 agents on the nearly two-thousand-mile-long US-Mexico border. Extending from California to Texas, about seven hundred miles of fencing that includes wire mesh, chain link, post and rail, sheet piling, and concrete barriers has been constructed at a cost of between $2.8 million and $3.9 million per mile.
