Air Force Tech. Sgt. Isaiah Martin, noncommissioned officer in charge of the honor guard at Dover Air Force Base, Del., oversees his team’s duties during the funeral service of retired Maj. John L. Harrison, Jr., World War II veteran and Tuskegee Airman, March 31, 2017, in Philadelphia. The Tuskegee Airmen were African-American military pilots who fought in World War II. Air Force photo by Senior Airman Zachary Cacicia