A riot control agent is a non-lethal chemical used to disperse a riot. It can rapidly produce sensory irritation or disabling physical effects which disappear following termination of exposure. Examples include tear gases such as CS gas and CN gas as well as pepper spray.
... of cities in Brazil
Cangaço (criminal riots)
Café com leite (reference to Brazil's domination by the "coffee oligarchs")
Coronelismo (reference to machine ...