U.S. Air Force Senior Airman Matthew Bonjoe Rosario, 48th Civil Engineer Squadron structural apprentice, prepares a protected aircraft shelter for maintenance at Royal Air Force Lakenheath, England, Aug. 7, 2019. The 48th CES Airmen perform monthly maintenance on each PAS to ensure their readiness and prolong their lifespan. (U.S. Air Force photo by Airman 1st Class Shanice Williams-Jones)