On the tarmac of Osvaldo Vieira, the international airport of the West African coastal country of Guinea-Bissau, sits a once-elegant Gulfstream jet, which in the normal course of events would have no reason to land in a country with no business opportunities and virtually no economy. In recent years, however, Guinea-Bissau has emerged as a nodal point in three-way cocaine-trafficking operations linking producers in South America with users in Europe; the value of the cocaine that transits this small and heartbreakingly impoverished country dwarfs its gross national product.