And they should come up with something better than "lock down"....dispersement is likely a better option.
I read that some of the clasrooms in CT did not even have doors that locked from the inside, apparenlty the only kids that survived made it into closets that had locking doors
PR overcame common-sense first line of defense security
Seems classrooms neeed to be like cockpits, with bulletproof locking doors
and escape routes
and cops that dont take 20 minutes to arrive