A letter to a friend Dear friend, We talk about two cities, Fortaleza and Curitiba, because I know both. Fortaleza has great dificults with security, there are an ambience the fear around the city. Another problem is a dificult with a clener of city. There is a lot of papers, conn, and ohers things in the streets. Here in Curitiba, I think that violence in not so bard, and we have a clean cty.