How Tear Gas Works: A Rundown of the Chemicals Used on Crowds temim 12:08 AM temim There are two broad types of tear gas—and they’re both engineered to cause pain -- Read more on ScientificAmerican.com from Scientific American News https://ift.tt/2DSuU9h via IFTTT Twitter Facebook Google Tumblr Pinterest Artikel Menarik Lainnya
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