The starting point is a fact of life: "Growing insecurity has been leading people, little by little, to lock the doors, to install safety devices and security cameras, to distrust the stranger who calls at the door. Nevertheless, in some neighborhoods there still are doors that are open.
Parte de un hecho de vida: "La creciente inseguridad fue llevando, poco a poco, a trabar puertas, poner medios de vigilancia, cámaras de seguridad, desconfiar del extraño que llama a nuestra puerta.