Pure NarcoHow does a young student majoring in Portuguese at Georgetown University in Washington, DC become one of the biggest drug smugglers on Earth? And how does he survive 25 years in the tradeand encounters with some of its most powerful and ruthless figures, from Pablo Escobar to Narcos Mexico's Alberto Sicilia Falcnwhen he hates violence and never carries a gun? In his decades in the business, the savvy, charismatic Luis Navia was responsible for