The documentary "The Truffle Hunters" follows a small group of secretive old men in the Piedmont region of Italy, who've spent their lives digging up the rare, and exceedingly expensive, white truffle. The movie looks at their quiet, quirky lives as they deal with a changing economic and global climate, and revel in the companionship of their truffle-sniffing dogs. KMUW's Fletcher Powell recently spoke with the movie's directors, Michael Dweck and Gregory Kershaw, about how they bring the audience into this unusual world. The interview has been edited for length and clarity. FLETCHER POWELL: When I think of all of our five senses, the one that's the most difficult to convey in a movie is smell. Which is too bad, because it's also the one that biologically is the most connected to our memory and our emotions. And for you, it was something that you had to figure out because, I gather, the key to understanding the allure of truffles is smell. So, I'm curious what you talked about as you