This story was about the experience in 2013. Technology has improved greatly since then but not as much as when we were a country that was on the leading edge admittedly. We talk about restarting coal mines that went bankrupt and building walls, old technology.
Lol, Tech is always advancing, but not buying that 2013 military stuff was that out dated. Israel has a wall too, don't see them claiming how out dated it was and tearing it down to put in flying drones. A physical barrier is a formidable deterrent today just as it was yesterday. Yeah you can dig under it, and fly over it if you have enough resources and cunning, but for the most part it just plain works.
Since the US started keeping a door between the passengers and the cockpit (physical barrier) like Israel uses, you haven't seen more planes taken over either. You do get undie bomb/shoe bomb attempts, but for the most part they have failed. Nope, not seeing that you can go wrong with a physical wall at all. The Iron curtain was only a few feet tall, but the electrical fence managed to keep people in quite amazingly.
Reminds me of an Reagan post, if I can find it...
"[H]e was not the accused standing in a dock and I was not a prosecutor, and that I had no right to bring up domestic matters of the Soviet Union. In fact, he said, a proposal then current in Washington D.C. to buld a fence along the Mexican border was as bad as anything the Soviets had ever done.
I replied that the fence was meant to stop illegal immigration by people who wanted to join our society because it offered democratic and economic opportunities--that was hardly the same thing as building the Berlin Wall, which imprisoned people in a social system they didn't want to be part of." An American Life ------Ronald Reagan
And since I am at it, another Reagan quote.....
"There was the security of our borders to think about, and the questions of our economy's ability to absorb an endless flow of refugees: If Communism prevailed in Latin America, it would end any hope of achieving the social and economic progress needed to bring prosperity to the region; and this would accellerate the flow of illegal immigrants who, propelled by poverty, were already overwhelming welfare agencies and schools in some parts of our nation." An American Life p. 473. ------Ronald Reagan