FBI agents have arrested a Texas man on charges that he and six other men gang-raped two toddlers in the restroom at Houston’s Galleria shopping mall and posted a video of the assault online. Hector Fernandez, 29, who worked at a kiosk in the Galleria, has been arrested on federal charges of sexual exploitation of children. He faces up to life in prison, and a federal magistrate has ordered him held without bond.