A computer virus named Stuxnet has drawn the attention of security and utility experts around the globe over the past two years or so. The experts say the virus has the potential to knock out power grids, leaving millions in the dark. It has already been used against the Iranians to slow down their nuclear development programs. Dan D’Ambrosio, a business reporter for the Burlington Free Press has been researching the story of Stuxnet. He spoke with WAMC’s Brian Shields.