Shouting to alert her family, Thaisa da SilvaRibeiro grabbed 4-year-old Isaac, who was playing in the door of their building, and brought him inside. Isaac's sister, 2-year-old Isadora, looked terrified. "It's not possible to get used to this, but unfortunately this is the routine in City of God," said Ribeiro, who is pregnant. Minutes later, Isaac cried about the incident while Isadora hugged her brother and tried to calm him down....