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I wanted to share an article but after read/scanned ~6 of them - I had nothing to share. They weren't any good. I wish blogs were still a thing. Blogs can be excellent on topics like these. Here's the Wikipedia page - Columbine High School massacre.
Growing up in the US, you just hear about people getting shot and killed. That's part of the 6:00 news along with sports and weather. There's no time to emotionally engage with what happened; you get maybe 5 seconds with a distraught family member and then it's back to the studio where nobody's showing any reaction, so, from a child's perspective, why should the viewer? So the jarring thing about Columbine for me wasn't that it happened, it's that people decided to keep caring about it unlike the hundreds of other shootings that we just immediately forgot.