I seem to recall the front glass was shot out, presumably so the 'push bar' or handle on the door could be accessed. That said, I never recall my schools of some ten-odd years ago having locked
front doors --not very welcoming, that.
The various side doors were locked, and the layout was such there were a few large open spaces between the entrance and actual classrooms, though, with offices/grown ups strategically placed between them (which would be great if there were gun owners among them
)
Somehow, I don't think higher fences, bigger locks, thicker doors, or sharper barb wire are the solution, any more than an extra security guard or two would be
. Bad enough that kids (and many adults) have to shuffle through life wearing ID tags from birth, any more, without their environment being a literal prison, as well. Remaining liberty won't last long at all in those conditions.
TCB