U.S. Air Force Airman 1st Class Joel Hernandez, 67th Aircraft Maintenance Unit crew chief, salutes the pilot of an F-15C Eagle at Kadena Air Base, Japan, Sept. 14, 2021. Dedicated crew chiefs are assigned to a single aircraft and are responsible for ensuring the successful completion of the aircraft’s maintenance. (U.S. Air Force photo by Airman 1st Class Stephen Pulter)