Chris Brenneman, Sue Boardman, and Bill Dowling are Licensed Battlefield Guides at the Gettysburg National Military Park. As part of his job working for the Gettysburg Foundation, Chris Brenneman has spent hundreds of hours studying the Gettysburg Cyclorama and identifying the amazing intricacies within the painting. Sue Boardman was the historical consultant for the Gettysburg Foundation for the massive project to conserve and restore the Gettysburg Cyclorama, and is the author of several books and articles. Bill Dowling is an award-winning photographer specializing in historical landscape ph...