My parents house in India was 2 stories high with 12 foot ceilings and a flat top terrace on top. As kids we were not scared to climb down from the top floor, including the 3’ additional railing wall. So 27’ was no big deal. One part of the house had a third floor room, also with a flat roof on top. When we climbed on top of that, it was like 37’ to the ground, and that looked extremely scary. We never dared to climb down from that side using the outside drain pipes. I still get nightmares, of accidentally falling down from the 3rd floor ceiling, which had only 1 foot high railing wall.
Well, I guess that we could always bolt some additional metal obstacle, like a 10 foot fence that curves outward with concertina on top, in those place where folks are too frisky.
So, did you ever fall 27'...or as a kid...just didn't have a lick of sense?
The wall is a force multiplier and is not going to keep illegals from crossing the border by itself. It’s purpose is a deterrent and to slow egress down so the BP can arrest them. Any unmanned wall is useless.