[hanamizu]

“The idea of securing the nation’s schools is no more far-fetched than securing airport terminal gates.”

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Not arguing with your basic point, but aside from armed staff, the school appeared to have pretty decent security. The murderer shot her way into the church/school by shooting out the glass in the doors. The (silent) security footage from the school shows a flashing lights after she shot her way in.

The police footage, with sound, has alarms going off as they hunt for the murderer.

[Hostage]

Fencing? Fencing with surveillance cameras, autolocks, secure gates?

You think $100 billion couldn’t make it more difficult?