Rep. Ileana Ros-Lehtinen won't let go of the mystery: Just where did the Cuban government get up to $3.9 billion it funneled through a Swiss bank over seven years. Was Havana simply, as it claims, banking its income from tourism and remittances that Cubans abroad send to their relatives on the island? Or was dirty money involved? Ros-Lehtinen, the Cuban-born Florida Republican, wants to know, and she has been badgering officials of the United Bank of Switzerland (UBS) and the U.S. Federal Reserve for answers. ''That's an awful lot of money,'' Ros-Lehtinen told The Herald. According to the latest answers...