It was a great story. A true story. The kind of story any news producer would love to report, nail down and get on the air. And that's just what Mary Mapes and her producing and reporting team did in September, 2004, when Dan Rather anchored their report on President George W. Bush's dereliction of his National Guard duty for CBS News. The firestorm that followed their broadcast trashed Mapes' well-respected career, caused Rather to resign from his...