Everyone is interested in building a wall to control the southern border more effectively, and while I agree in theory with that idea, a wall is not only expensive, but can be tunnelled under or climbed over...I have another suggestion.
Instead of a wall, dig a trench, roughly 100 yards across and 30 feet deep...fill it with a cheap tangle of razorwire. Then build National Guard watchtowers with night vision equipment, etc. at regular intervals, and have the Guard on patrol the entire length of the border (fully armed). Make regular runs with Air to surface radar planes.
The military has to train regularly anyway, why not do it on the border?

