Everybody in La Zona of Reynosa (900,000-inhabitant city near the Texas border) does drugs, especially crack. It's a place controlled by an organization called Las Zetas, loosely related to the Camorra. They are in the middle of a bitter drug war with the Mexican Military. Access to drugs is very easy in this somewhat lawless zone. Locally, it is known as "La Zona de la tolerancia". Many of the working girls go there not only to work as prostitutes, they often try to escape the law for every reason imaginable. One of them being heavy drug use. As long as they stay inside nobody will bother them. The entrance to La Zona is protected by barriers and is constantly monitored by the police.