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 But mass shootings are way up. It's like a fire drill; it's something kids may well encounter.
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@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. -
@zeynep Great example! Today's lockdown was a drastic overreaction to a risk unlikely to ever materialize. - Show replies
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@zeynep Sure, they might get hit by lightening too. Response is not rational given the actual mathematical risk.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@zeynep Resources spent guarding against something so unlikely could be better spent guarding against much more likely harm.Thanks. Twitter will use this to make your timeline better. UndoUndo
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