Don't forget Columbine. People always leave that out, but as far as historical milestones that shaped how awful American society has become, it was a big one.
It's hard to even explain to people that there was a time when it used to be a very shocking thing to hear about.
"Back in my day, parents didn't have to send their kids off to school every morning pretending everything was normal, but internally struggling with anxiety they might never see them again."