Not sure of the wall is needed in the USA, what is needed is that Mexico standard of living is brought up. I dont know the politics ongoing between USA and Mexico, but what I know is that we do not have a wall around Europe and we border some interesting countries like Moldovia where the Mafia is boss in the southern part of that country, and we are bordering White Russia with a true dictator onboard. BTW, a wall will not solve trafficking and drugs transports, on both sides the polices is corrupt as well and the dig tunnels anyway.