This is insane https://en.m.wikipedia.org/wiki/M44_(cyanide_device)
https://twitter.com/poppy_haze/status/1409508883471769603 :agony-shivering:
A kid was hurt by these cyanide mines and it also killed his dog https://amp.idahostatesman.com/news/local/environment/article217956755.html
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There's a TV show with Kevin Costner called Yellowstone that's about that very fact.