Airport Security: Peru and Brazil

This season features four episodes each at two of Latin America's biggest airports: Lima, Peru's Jorge Chavez and Brazil's São Paulo-Guarulhos. Police are on high alert. Their main challenges: illegal immigration and the trafficking of cocaine. From hidden compartments and ingested capsules to fake documents, officers work 24/7 to protect their borders and stop criminals in their tracks. Watch the action from behind the scenes. (National Geographic)