Is that soda you're drinking giving you cancer? Charles Margulis says that it it's Pepsi, it might be. He's the communications director for the Center for Environmental Health, which says that Pepsi has not followed Coke's example in removing a cancer-causing chemical from the caramel coloring in its products nationwide. On my America Weekend show, I asked Margulis to explain what the danger is, why Pepsi hasn't followed its rival's lead, and why the FDA allows the company's soft drinks to continue to be sold. Listen, then click here to subscribe to these podcasts via iTunes!