I can't understand how not to blame the US Security that exist in every airport and alows that happen. In the moment of check- in they should do a good job and avoid someoene travel with the child alone without check if the child has permition to leave the country. A Brazilian passport must have a statement that the father agree. I know many Brazilians that can't travel alone with their children. If she is not in her Mom's wound is not possible to hide, how they don't perceive that before their own eyes?