Halfway back to the Keys on Seven Mile Bridge, as day lost its eternal struggle against night, someone in Miami called in to the radio station I was listening to, and requested Gloria Estefan's Si Voy a Perderte. I turned it up and listened to the sad strains of Estefan's emotional pleading while I drove across the water in darkness. I could almost have sworn under oath that the caller's voice was that of Anna Marquez...