Brazil is no stranger to urban mayhem, with street shootouts splashing the front pages of newspapers each day in the nation that tops the world in deaths by firearms. But Thursday's massacre of 12 children at school in western Rio de Janeiro has touched a nerve in this hardened nation. As families hold burial services today, Brazil is asking how such violence more associated with the United States became a reality here. As happened following the 2007 Virginia Tech... (GunPolicy.org)