When Mercedes (“Mercy”) Rodriguez arrived in America on a fall day in 1979, the first thing she noticed was how clean and wide the streets were. The 15-year-old Cuban refugee had just arrived on a plane carrying nearly a dozen political prisoners, including her father and brothers. They had been blacklisted and then detained for opposing Fidel Castro’s rise to power but were now finally being released after years of imprisonment as part of an agreement between America and Communist Cuba. I sometimes wonder how many broken hearts lie between La Habana and Miami. The flight from Cuba to Miami...