The term “tear-gas” covers a range of chemicals, of which the most widely used include o-chlorobensylidene malononitrile (cs), oleoresin capsicum (oc, or pepper spray) and 1-chloroacetophenone (cn). The gases are in fact powders, and new variants are designed to disperse slowly. Bizarrely, chemicals that are so often used on civilians are banned for military use.… Read More