State of Florida just issued some updates to DOE Office of Safe Schools. Most of the updates indicate that the doors are to be locked and closed...
Yeah, these type of threads and posts didn't age well. We should all take the position of people from Missouri - Show Me.
I thought he was referring to the side door that a teacher propped open giving the shooter access to the school. That was Uvalde.
This is the only explanation that makes any sense.