A new report by the U.S. Surgeon General says even brief exposure to tobacco smoke, whether from smoking a cigarette or breathing secondhand smoke, can damage your DNA in a way that leads to cancer. The Surgeon General's first report in four years claims cigarettes are designed to be more addictive than ever, and that, in someone with underlying heart disease, even one cigarette can cause a heart attack. "Tobacco smoke damages almost every organ in your body," the Surgeon General said. About 40 million Americans smoke, and 443,000 die from complications related to tobacco smoke.