Belgrade authorities have used sound weapons on the crowd of protesters. The video description has some educational links.

There are lots of videos around.

    • @[email protected]
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      172 months ago

      Some police forces have used sound cannons against protesters, for example during the 2009 G20 Pittsburgh summit,[7] the 2014 Ferguson unrest,[8] and the 2016 Dakota Access Pipeline protest in North Dakota,[9] among others.

    • @[email protected]
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      72 months ago

      Agents provocateur are much easier and less obvious. If it ain’t broke, don’t fix it.