True air power
U.S. Air Force Airman 1st Class Locke Williams, 44th Aircraft Maintenance Unit crew chief, communicates with an F-15 Eagle pilot while conducting pre-flight checks April 19, 2017, at Kadena Air Base, Japan. Throughout pre-flight checks, crew chiefs maintain a constant line of communication with the pilot in order to ensure the process is running smoothly. (U.S. Air Force photo by Senior Airman Lynette M. Rolen)