So what should have been done as a response to 911?
I'm glad you asked.
I've weighed in on this before, but to summarize....
1) Change the culture of US government & military from one of offense to defense.
Offense is very expensive, but not all that good at preventing distributed attacks,
which (as we saw) are extraordinarily costly.
2) Harden our infrastructure, exempli gratia....
- Make airplanes impossible to hijack. This would be both physical, legal & procedural.
- Decentralize utilities, eg, more smaller power plants, home solar generation, home cogeneration.
- Upgrade internet security.
- Stronger border security.
- Distributed disaster preparedness, eg, every home storing water & food.
3) Pursue the entities responsible for the attack, adjudicate, & punish them.
It's not about regime change or fixing broken countries.
4) Alter building codes to better cope with attacks.
5) Conduct foreign policy so as to avoid making & inflaming enemies.
6) It's hard to remember them all.