What are CS canisters?
Tear Gas, military style.
CS is tear gas. While its supposedly only an irritant some studies show it causes significant pulmonary, heart, and liver damage.
When burned CS releases phosgene gas. Phosgene is classified as a chemical weapon and is banned by international treaty.
In Waco they killed numerous people because CS tear gas is heavier then air and it displaced all the oxygen in their lungs. One little girl was found bent backwards with her back broken. The muscle spasms caused by the chemical broke her back.