Joe Dana, CNN

Pinal County, AZ (CNN) - Drug smugglers are getting creative when it comes to getting their cargo across the US-Mexican border. What appears to be a shipment of Coca-Cola is a cover for a different commodity with broad consumer appeal: heroin. The soda shipment scheme is one of the latest smuggling attempts foiled by border agents at the Nogales Port of Entry. Joe Agosttini - Assistant Port Director, Nogales, Arizona: "You know they're always ahead of us.