This blog tries to avoid politics. The SOTU makes a technical reference to the proposed wall, so we comment.
Quoting from Feasibility of the Southern Border Wall?
A smart wall is simply an extension of battlefield technology. The modern battlefield is alive with sensors, enabling rapid, accurate response. While military use centers on lethal force, the smart wall is compatible with minimized lethality. In Israel, border barriers comprise mainly (AZ Central) steel fences, augmented by sensor fusion to provide detailed information about who is doing what to the barrier, and where.
Any damage to a steel fence, even a truck bomb, can be repaired in a few hours, versus months for a concrete wall.
Quoting (CNN) SOTU,
This is a smart, strategic, see-through steel barrier — not just a simple concrete wall. It will be deployed in the areas identified by border agents as having the greatest need, and as these agents will tell you, where walls go up, illegal crossings go way down.
It is gratifying that, whatever the inspiration, “smart” technology is part of the discussion.