We need a wall on the southern border and cameras to keep an eye out for those who dare to climb the wall. Electrified and barbed wire across the top will help to keep the illegals out. The troops will be shot at and have to be replaced and they have to be paid, too. I would rather save their lives so their families will have Moms and Dads. So, it makes more sense to build a wall.
We have major league drug dealers smuggling who knows what across the border and we have terrorists bringing who knows what across the border. Besides the biggest threat, anchor babies and unchecked illegal immigration that will sink the ship of the us financially if left unchecked.