Every cocktails in the South has its own story. Just look up the history of the mint julep or the gin fizz. A new documentary by an Atlanta filmmaker tells the story of one of the most famous cocktails to come out of the South. The film, "The New Orleans Sazerac," was shown at the Cannes Film Festival earlier this week. We talk with filmmaker James Martin and bartender Clair McLafferty, who writes about Southern cocktails.