You cannot protect every school against Beslan. You can, however, detect and interdict Beslan which apparently works pretty well and is a lot less asset intensive. The FBI is pretty good at that so far
because it has to involve multiple people and planning. A number of planned attacks of one sort or another have been stopped. Do you want to protect against Alien invasions, too? Would you redirect the whole resources of the state to protecting the schools? The best answer is the one no one considers at all and the one that is best for many reasons. Get your kids the hell out of the public school propaganda orgs and day prisons. Anyone who cares for his children and their future who has them in public school is suffering from a gross disconnect in awareness. Public school is mental child abuse.
No.
I want to protect against active shooters inside schools.
It’s pretty simple.
But it looks like people would rather have their money instead, so, see you the next time this happens, because nothing is going to be done.