Four executives with one of the largest construction firms in South America, Camargo Correa, were arrested by Brazilian police on March 25 in connection with a yearlong corruption probe. In all, 10 employees of the firm were arrested as federal police carried out a series of raids on the company’s offices in Sao Paulo and Rio de Janiero. The operation was part of an investigation named Operation Sand Castle. Photo: Hermano Luders Itaipu dam contractor faces charges. Investigators with Brazil’s federal prosecutor’s office specializing in financial crimes say Camargo Correa was laundering money through fake companies and illegal currency traders.