Out guest is historian Noah Andre Trudeau, author of "Southern Storm: Sherman's March to the Sea." Trudeau has written what most experts regard as the definitive account of the devastating campaign of General William Tecumseh Sherman which cut a swath through Georgia in 1864 and helped hasten the end of the Civil War (though it did not bring the Confederacy to its knees as Sherman thought it would.) Trudeau has worked tirelessly to separate fact from fable.