I will never forget it, I was in a record store in Saarbrücken, it was my best friend's birthday and I bought an experimental Sonic Youth album
The cashier told me the news that first one and just now a second plane had hit the WTC. We knew it meant war. Shitty day. Somehow that day was in fact a goodbye to the 20th century, the old paradigm.
Image from Wikipedia https://en.wikipedia.org/wiki/SYR4:_Goodbye_20th_Century
It certainly did change a lot of things. Thanks for sharing. I used to be a huge Sonic Youth fan. It's kind of interesting to have such an event connected to an album or a band.