For more from LBG Garry Adelman, follow him on his Facebook page. You may want a pair of 3-D glasses for the second half of the talk. Related books: Gettysburg in 3-D, Antietam in 3-D, 99 Historic Images of the Civil War in the West, and Devil’s Den: A History and Guide.The video was shot on Saturday, September 3, 2016 at the Gettysburg Heritage Center.