U.S. Air Force Staff Sgt. Sergio Bravo, 912th Air Refueling Squadron crew equipment craftsman, inspects KC-135 Stratotanker pilot helmets at March Air Reserve Base, California, July 14, 2021. Equipment is inspected every 120 days to ensure safety and success of KC-135 pilots. (U.S. Air Force photo by Airman 1st Class Anneliese Kaiser)