I've heard several teachers say the classroom doors had to be locked from the outside; does anyone else find this rather insane?

Didn't SH just go through a big revamp (not to mention multiple massive drills that summer) in security? One teacher (sorry, don't remember if it was Roig) tearfully said that the doors locked from the outside, so the janitor (risking his life, implied) locked all the doors for them.

What good is a school lockdown if you can't safely look your own classroom door?