Law enforcement is a major solution factor with the illegals, however there is still the issue of drugs coming over the border. It’s tough throwing tons of cocaine over a 30’ wall.
There you go again.
They found an air cannon that was constructed to shoot 20 kilo cocaine "rounds" over the fence near San Diego on the Mexican side. It was similar to one of those pumpkin cannons. We are talking about big money and if there is a will there is always going to be a way around a deterrent.