TEXT: "Ballet instructor Joana Machado instructs young girls at her House of Dreams dance studio in Crackland, one of the roughest neighborhoods of downtown Sao Paulo, Brazil. ""We see all kinds of stories here. From girls who haven't showered in days, who don't know how to brush their teeth, who are locked inside their homes all day,"" said Machado. ""I feel always responsible for their lives, always worried about what may happen."""