Six-year-old Manuel Diaz and his mother first arrived at Miami's airport in 1961 with little more than a dime for a phone call to their relatives in the Little Havana neighborhood. Forty years after his flight from Castro's Cuba, attorney Manny Diaz became mayor of the City of Miami. Toward the end of the twentieth century, the one-time citrus and tourism hub was more closely associated with vice than sunshine. When Diaz took office in 2001, the...