Last October the Physicians Committee for Responsible Medicine, a nonprofit with 12,000 doctor members, asked Philadelphia's Office of the District Attorney to launch a reckless-endangerment investigation. The trigger for this extraordinary request was not a new attempt by the tobacco industry to sell cigarettes to children or by the petroleum industry to reintroduce lead into gasoline. It was a set of papers and proposed dietary guidelines, published in the Annals of Internal Medicine, suggesting it's fine for Americans to continue eating a diet rich in red and processed meats.