The May 13 story on the Web site Truthout.org was explosive: Presidential adviser Karl Rove had been indicted by Special Counsel Patrick J. Fitzgerald in connection with his role in leaking CIA officer Valerie Plame's name to the media, it blared. The report set off hysteria on the Internet, and the mainstream media scrambled to nail it down. Only . . . it wasn't true. As we learned last week, Rove isn't being indicted, and the supposed Truthout scoop by reporter Jason Leopold was wildly off the mark. It was but the latest installment in the tale of a troubled...