MIAMI (AP) -- In the weeks before U.S.-backed exiles invaded Cuba at the Bay of Pigs, Felix Rodriguez was spirited into the island to work with underground forces against Fidel Castro's fledgling revolutionary government. A 19-year-old named Santiago Alvarez stood ready in the Florida Keys for orders to attack by sea, while another exile, Alfredo Duran, trained in Guatemala for a beachfront assault at Playa Giron on Cuba's southern coast....