FILE - In this Aug. 22, 2015, file photo, in Mexico City, Catire Walker, 41, poses with his daughter Carmin, 3, and son Dimas, 8, in their 1980 Volkswagen van, which the family named Francisca. Walker and his wife Noel Zemborain piled their children into the van in March in Buenos Aires, Argentina,... (Marco Ugarte)