Idk, but
 

what about those rubber door jambs.
A few in every room would make entry diddicult

Your link only cites old CDC data. Data that they've since backed off from...

To your 2nd point... Another topic for another day...

Masks may have some benefits. Of course some are better than others and masks are still required last time I went into doctors building last week. Surgeons wear them while performing surgery. People are still getting Covid and some are dying. IMHO vaccines are best for protection but nothing is 100% guarantee.

Good post
 

Good post. I didn’t have to get under a desk as the OP originally suggested was the practice in those days. Getting under your desk was a good practice for an advancing tornado but for a nuclear bomb not so much. When you think
about it, nothing was gained but then nothing was lost either by the practice.

So have you actually been through the instructions given to teachers, staff and students. I have and that’s not what they are told.

what are they told? enlighten

Same thing back in Southern Minnesota. The tornado sirens were tested the first Wednesday of every month at 1:00 PM sharp.

I didn't know where the town siren was located until one day I rode past it on my motorcycle when it kicked in. Sound that loud has some funny effects: I was disoriented and dizzy, and for a couple of moments I couldn't remember where I was going. Fortunately the road had a wide shoulder; I pulled over and let the effects wear off. Took maybe a couple of minutes.

I remember those days. The NRA magazine "American Rifleman" used to regularly run ads selling surplus military rifles. Even by the standards of the day they were ridiculously cheap. Dad ordered a couple of (I believe) 30:06 Springfield rifles which arrived packed in cosmoline. Dad was an amateur gunsmith so he sporterized them: looked pretty good as I remember.

Funny--we feared The Bomb back then but not each other.

I just retired from education. The standard practice for a shooter in the building was to hide out of view from the locked door's small window and close all the window shades. We would go to a safe corner of the room. If you were in the halls, you would get students into bathrooms and classrooms immediately and if in the cafeteria all students into the kitchen area. If there was a potential threat outside the building or the surrounding community, all window shades closed, all doors locked, and none can leave or enter the building. No hiding under desks!