BUENOS AIRES, Argentina (AP) — Arquimides Puccio seemed to neighbors like a pious, conservative and obsessively tidy man. Several times a day, he'd sweep the sidewalk in front of his home in an upper-class Buenos Aires neighborhood.Cleanliness was not his only aim. Puccio was making sure that the screams of kidnap victims imprisoned in the basement of his home could not be heard in the street.That mundane mask over horror is a key theme of "The Clan," a movie based on a true story that rattled Argentine society in the 1980s.The well-reviewed film, directed by Argentine Pablo Trapero, has had the most successful launch of any Argentine film.