Listen, pendejo, first it's more symbolically important. Second, your point begs the question of who is making what legal. The Berlin Wall teaches us that barriers, physical or otherwise, have major impacts on all parties - to the detriment of all. If people wanted to support border security then increased resources and better use of technology (thermal analytics, etc.) instead of a long set of blocks of concrete. I mean really, what century are we in? What a tremendous waste of money