Here, it's part of first week of KINDERGARTEN. They say "in case of bears" and teach kids to hide in the closet. 

https://twitter.com/cjwerleman/status/672163702552989696 …
@harryh Already had one lock down on campus today. Police with AR-15s, sirens. It's not even the first lock down of the year for my campus.
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@zeynep Great example! Today's lockdown was a drastic overreaction to a risk unlikely to ever materialize. -
@harryh On a campus? It's a very plausible risk. There's a school shooting almost every week in the US. Much more than school fires. - Show replies
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