U.S. Air Force Airman 1st Class Andrew Foust, 961st Aircraft Maintenance Unit aerospace propulsion apprentice, inspects an E-3 Sentry engine at Kadena Air Base, Japan, Aug. 30, 2021. E-3 Sentries are capable of command, control and communications operations for tactical and air defense forces. (U.S. Air Force photo by Airman 1st Class Stephen Pulter)