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I wonder what the cost differential between The Trump Wall, and autonomous vehicle patrols would be.

Electric vehicles with solar charging would be very cost-effective as a border security mechanism.

Where are all the border security startups? Lots of government cash on the table I would think.

Well, a wall for start wont shoot you in the face just because you want to cross a border.

A wall, doesn't need electricity.

The maintenance cost is lower.

Can't be hacked.

Oh, and you can paint nice big pictures on it.