They publish it for notable shootings, not just school shootings.
See https://en.m.wikipedia.org/wiki/'No_Way_to_Prevent_This,'_Says_Only_Nation_Where_This_Regularly_Happens for a list.
Example of non school shooting: https://en.m.wikipedia.org/wiki/2017_Las_Vegas_shooting
I know you are just using this as an analogy, but if you are curious:
And:
I think the horrors of nuclear weapons were at least responsible for ending the war quicker and saving lives that would have been lost during a ground invasion if Japan never surrendered.