Sales of electronic cigarettes, battery-powered devices that allow users to inhale doses of vaporized nicotine, are expected to reach over $1 billion in the US this year. Some say e-cigarettes help smokers kick their habit, but their long-term health risks are still under study. Dr. Susan Pinney, program leader, Cancer Etiology, Control and Prevention of the and and deputy director of the , Nurse Practitioner and Certified Tobacco Treatment Specialist with the , Michael Krueger, and Dr. Shannon C. Miller, VA Medical Center physician and certified tobacco treatment specialist and professor of Clinical Psychiatry discuss tobacco smoking and e-cigarettes.