U.S. Air Force Senior Airmen Mario Gamboa and Kiley Smith, 31st Logistics Readiness Squadron individual protective equipment journeymen, apply extension labels to gas mask canisters, Sept. 9, 2015, at Aviano Air Base, Italy. Airmen in IPE check for equipment serviceability to safely extend proposed expiration dates instead of disposing items. (U.S. Air Force photo by Senior Airman Austin Harvill/Released)