Staff Sgt. Gary Reese, a structural journeymen with the 914th Maintenance Squadron, walks through the torn apart insides of a KC-135 Stratotanker while it undergoes a periodic inspection (PE) at Niagara Falls Air Reserve Station, New York, April 12, 2023. A PE is performed every 15 and 30 months on an aircraft to ensure every part, system and function is repaired and working properly so Airmen may safely fly it during future missions. (U.S. Air Force photo by Airman 1st Class Kylar Vermeulen)