Army Col. Phillip Cuccia, U.S. Army War College academic engagement director, center, goes through the steps of firing a Civil War cannon with U.S. Air Force field grade officers at Gettysburg National Military Park, Pa., April 18, 2019. The Air Force officers took a tour of the park during the 2019 Air Force District of Washington Squadron Commander and Spouse Orientation Course to learn about leadership principles from the past, and how they relate to the present. (U.S. Air Force photo by Master Sgt. Michael B. Keller)