In the predawn darkness of July 13, 1994, 72 desperate Cubans – old and young, male and female – sneaked aboard a decrepit but seaworthy tugboat in Havana harbor and set off for the U.S. and the prospect of freedom. A few miles into the turbulent sea, 30-year-old Maria Garcia felt someone tugging her sleeve. She looked down and it was her 10-year-old son, Juan. "Mami, look!" and he pointed behind them toward shore. "What's those lights?" "Looks like a boat following us, son," she stuttered while stroking his hair. "Calm down, mi hijo (my son). Try to sleep. When...