Insurance company insiders don't often open up about what goes on behind closed doors. But Wendell Potter, who headed corporate communications at Cigna, dishes about that and more in the book, Deadly Spin: An Insurance Company Insider Speaks Out on How Corporate PR Is Killing Health Care and Deceiving Americans. The book is due out in November. But the Forbes blog has already shared some juicy tidbits. Potter claims that over five years, the insurance industry avoided paying $300 million in claims by retroactively canceling policies of patients who racked up big claims, allegedly because they had lied about their pre-existing conditions. Article