Unfortunately there has been so much scaremongering in the US that many people there seem to believe they are constantly at risk of being gang-raped in their homes. This sells a lot of guns but it is an awful way to have to live.
On average, more than 100 per day die from gunshots in the US, so it doesn't have 'newsworthiness' from that point of view. And the fact it was at a school? It was the 15th this year, I believe, so not so much shock value there any more either. This one only got the attention it did because it...