With more concertina wire
Illegals will be processed
One slice at a time.
Ooooo, you might separate FAMILIES with the slice and dice routine. Families who CHOSE to bring kids over a perilous journey with the hopes of making it onto the gravy train. Disgusting, and doesn't evoke one iota of pity in me.
I still think that Cholla Cactus would be as effective and take less maintenance than concertina wire.
Install some “Dragon Teeth” anti-vehicle barriers and a bed of cactus 30 or 40 yards deep and you’ve created a very effective barrier