man standing and covering his face using shirt

Police fires tear gas grenades on protestors on the streets of Lyon, France, during the 25th weekend of Yellow Vest protests. A protestor tries to protect himself and prevent the harmful gas to reach his airways. Protestors are no longer allowed to wear face or head protection according to a law, enacted by the French government as a reaction to the riots. CS (or tear gas) is not just itching powder, but nerve gases, that react to moisture and activate pain. It "can cause severe pulmonary damage and can also significantly damage the heart and liver" (source: Wikipedia, http://tiny.cc/86f95y)