U.S. Airmen wait in line to get signed-off after receiving their flu vaccine during the flu point-of-distribution exercise at the Langley Community Commons, Joint Base Langley-Eustis, Va., Oct. 5, 2016. To avoid long wait times, Airmen were encouraged to visit the POD during the time scheduled for their unit. (U.S. Air Force photo by Staff Sgt. Teresa J. Cleveland)