Fences are for fairies and snowflakes. 10” thick concrete slabs 40’ tall set 10’ in the ground and topped with razor wire. Anyone observed scaling the US side will be shot.
10' ain't near deep enough. We found tunnels that were over 20' deep. It is evident you do not know what we are dealing with and should leave the planning to others.
I do like the shooting part and have always thought that would be a major deterrent. But, why not both ways just for the fun of it?