Barbed WIRED AT THE TOP as are prisons
ELECTRIFIED
On the U.S. side,build a MOAT, the moat needs to be at least 15 to 20 ft deep, to keep them from digging tunnels
Put alligators in the MOAT, EELS whatever
or run dogs, PIT BULLS,MASTIFFS, MEAN DOGS or BOARS to keep MUSLIMS OUT.
Build a second fence the same as the first.
I think this is the perfect FENCE on the BORDER.
The Israelis know how to build a fence - hire some consultants.
This would be a perfect way to get the envirowackos into something much more valuable than protesting how much carbon is coming out of every humans lungs every day, just enlist these wackos in a project to oxygenate a 1000 mile long moat that will sustain a healthy population of pirahna