>I fear the overreaction coming, of both citizens and governments. I fear the Europe will split, or start a war with someone, or draconian security measures will be introduced by the government.

so... As an American who is old enough to very clearly remember America both before and after the 9/11 attacks? to the extent that America is like France, I can speak some to those fears.

We did several of those things. We massively overreacted; I mean, we didn't split, but we did pick a war with a country who's people kind of looked like the people who attacked us (and another war with a country we had some evidence that they had something to do with the attack) - and yes, both wars were pretty costly in terms of money, geopolitical power and credibility, commodity prices and world stability, but it didn't break us, and it didn't spill out into a major war between industrial powers. It didn't turn into Vietnam, or even something as bad as the CCCP's experience in Afghanistan. I'm not saying it was a good experience, just that it's survivable, and not as life changing as you seem to think. This isn't a war of the 19th or 20th century between major powers. This is a 21st century asymmetrical war, and while that's still pretty bad for whoever ends up getting blamed for these attacks, it's not the end for Europe.

Yes, the security measures were very costly. Airplane travel is dramatically less convenient, which means more traffic. Lots of lost productivity. We've lost so many human-years standing in line, waiting to be groped... or driving instead of flying; that has caused who knows how many extra deaths. (re-reading this... while I logically stand by the idea that we've lost more to the security measures than to the original attacks... on an emotional level, I feel shame for saying so out loud.) Personally, my perception is that this is slowly getting better with the pre-groping of the 'tsa pre-check' or the straight up money check of the "CLEAR" program. I mean, air travel is never again going to be as easy as it was when I was 19 during my lifetime, but it's not as bad as it was when I was 22, let me tell you, and it's getting better.

But... even at it's worst? This wasn't world war two. This wasn't even the Crimean war, at least on my side of the conflict. I mean, I don't want to diminish the sacrifices of our soldiers, it's not a job I would want to do, but being deployed in the wars we engaged in after 9/11 was less dangerous than delivering pizzas, if you only count the chance of getting killed or maimed, rather than harder to quantify mental traumas associated with fighting a war (which personally, I find to be a much larger deterrent to becoming a soldier than the danger. I was... just about at prime recruiting age on September 11th, 2001.

And for the rest of us? Yeah, 9/11 was a big deal. A bigger deal than I understood it to be at the time. A much bigger deal. but... it wasn't the end of life as we know it.

That was the weird thing about my 9/11 experience. So I had a dot-com job, and my boss was watching the news on a very early live-streaming website. (I want to say it was CNN or something, but I don't remember) I was mildly annoyed with her for not working and instead subjecting me to, you know, video news.

My thoughts at the time were the opposite of yours. It did not occur to me that this was going to change my country; It took me quite some time to understand that this was hugely impactfull.