Why not create or enhance an "electronic wall "to notify border patrol about incursions across the border and direct troops to turn back ilegals?
This is easier said than done.The CBP has repurposed a number of military technologies for surveilling the border. They even have their own fleet of drones, although that may not be an especially cost-effective option.They have tried several times, with various approaches, to establish a form of “electronic fence” at the border. There are numerous problems associated with this.The geography and climate are inhospitable. It’s mostly dry desert, with some mountainous terrain. There’s no access to electrical power, and the sites are too remote to be served by a generator.The installations are remote, but often passed by illegal immigrants or their coyote guides. These people have both motive and opportunity to vandalize the equipment. A few bullets fired from a rifle, or even a well-thrown rock, can disable your expensive gear. It might be a while before a tech can get in to repair it. If and when he does, it won’t be long before it’s wrecked again.The remote nature of the sensors often requires the network to be interlinked, mesh-style. If one sensor goes down, it can take all those in the area down with it.Even when a sensor network is working at top efficiency and the operator can tell exactly when and where someone is crossing illegally, the information is not worth much if you can’t get Border Patrol agents in place to stop and apprehend the suspects. It does no good to sin one or two agents if you have six or a dozen illegals. You need enough agents that can effectively contain the suspects, overcome any resistance, render medical aid if needed (and it’s often needed), and a vehicle that can transport them to a holding facility. Getting all those things to where they are needed can be tough. Even if you know a pack of illegals are crossing at Point A right now, it will take some time to get agents in place who are 20–50 miles away at the time of the sighting. Meanwhile, a similar group may be crossing at another point five or ten miles away, knowing that the CBP can get, at best, only half of them.The CBP has about 23,000 patrol agents deployed on the U.S.-Mexican border, which is 1,989 miles long. Let’s assume that 20% of them are on duty at any one time (that is a generous estimate). That’s 2.3 agents per mile, and only while none of them are tied up on an arrest, or a transport, or in court, or doing any of the other things a patrol agent does at work. If you had 2.3 miles of desolate area to patrol alone, how easy do you think it would be for someone to get past you now and again?