Tech. Sgt. Isaiah Martin, NCO in charge of the Dover Air Force Base Honor Guard, oversees an Honor Guard team’s duties during the funeral service of retired Maj. John L. Harrison, Jr., World War II veteran and Tuskegee Airman, March 31, 2017, at the Chapel of the Four Chaplains at the Navy Yard in Philadelphia, Pa. The Tuskegee Airmen are a group of African-American military pilots who fought in World War II. (U.S. Air Force photo by Senior Airman Zachary Cacicia)