Some figures on the trend in mass school shootings:

https://www.sciencedaily.com/releases/2018/04/180419131025.htm

OK, school shootings are pretty trivial as a risk to life (handguns are much more significant) but this sort of statistic does make the gun-nuts look even nuttier.

In fact the number of people killed by guns in the US is hardly significant at all. The real damage is to the people who own the guns - they're an instrument of political indoctrination.