U.S. Air Force Senior Airman Jacob Valdez, 34th Aircraft Maintenance unit crew chief, secures a panel on an F-35A Lightning II Jan. 25, 2018, at Kadena Air Base, Japan. The F-35A is deployed under U.S. Pacific Command’s theater security package program, which has been in operation since 2004. (U.S. Air Force photo by Senior Airman Quay Drawdy)