Narrator: Much of the coverage of the 2020 protests against police misconduct in the United States has looked a lot like this, shrouded in a thick cloud of tear gas. Some of the sounds in this ...

Some 10,000 rounds of tear gas have been fired by police on the streets of Hong Kong since protests first broke out in June. In some cases, hundreds of tears gas canisters have been deployed in a ...

On the afternoon of May 1, 2005, in the midst of a social protest, the 15-year-old Nicolás Neira was hit in his head by a tear gas projectile, causing serious injuries, resulting in his life five ...