The decrease in domestic terrorism is due to societal changes and better old-fashioned policing of home-grown extremist groups. We didn’t somehow make it impossible (or even difficult) to improvise large explosives.
Well, those folks had to spend a few years planning, take flying lessons, dry run everything a few times, and then pull off the most complicated and coordinated terrorist attack in US history.
The actual bomb planning for the Oklahoma City bombing was less than a year and involved two people. So, seems like the bar was raised quite a bit.
You're giving the 9/11 terrorists far too much credit.
They were supported/financed by the Saudis[0] and America dropping the ball was the only reason they succeeded.
It's not so much a big victory for the terrorists as a big black eye for America and our intelligence agencies.
One of the 9/11 pilots was reported to Federal agencies multiple times[1] and the hijacking still took place.
How well did laws to stop isolated crazy people killing lots of people stop … um … a group of countries investing large amounts of money and years of time into planning and training for the largest single attack on a civilian target in history?
I mean sure, you could also ask how laws against shoplifting fail to stop bank robberies, and it would be just as coherent.
The decrease in domestic terrorism is due to societal changes and better old-fashioned policing of home-grown extremist groups. We didn’t somehow make it impossible (or even difficult) to improvise large explosives.