not just the American picket fence dream anymore

A massive (and massively costly) fence is going up along the border near San Diego to certain environmental detriment. I hardly want to know what the ancient American Indians would have had to say about our recent wave of anti-immigration sentiments. Had they built fences, would we be here to lock others out today?

http://www.dezeen.com/2008/08/07/global-warming-rug-by-nel-for-nanimarquina/