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How smart would a 'smart wall' be at the border?
Deep in the Otay Mountain Wilderness, there is no wall.
The only boundary between the U.S. and Mexico is a section of barbed wire fence in a pastoral valley. And miles and miles of treacherous terrain.
It’s a territory criss-crossed with steep trails that disappear into tunnels of thick brush, a place looped by violently rutted roads that Border Patrol agents negotiate daily.
Land such as this is not a likely candidate for President Donald Trump’s “big, beautiful wall.”
https://www.sandiegouniontribune.com/news/border-baja-california/sd-me-virtual-wall-20190324-story.html
