We already know how to harden schools. Uvalde messed up - that door should have been locked and there was supposed to be a resource officer there. They already

We already know how to harden schools. Uvalde messed up - that door should have been locked and there was supposed to be a resource officer there. They already had things like bulletproof doors (that worked against them as police fumbled to respond)! The issue is not how to do it, or even allocating resources (Uvalde had them!), but while we do not have realistic solutions for how to keep guns out of the hands of lunatics - how to maintain vigilance at every school everywhere in the event of a very low probability event.