Two Rhode Island residents are filing a nationwide class action lawsuit against Target over the retailer's massive data breach.  Target officials announced Thursday the security breach could involve credit and debit card information for as many as 40-million customers.  In their suit, William Knowles and Patricia Doyle accuse the retail giant of violating the Federal Stored Communications Act and of breaching an implied contract to safeguard the confidential financial information of its customers.  The suit was filed Friday in the U.S. District Court of Rhode Island.