Senior Airman Nicholas Smith, 380th Expeditionary Aircraft Maintenance Squadron E-3 Sentry Aircraft Maintenance Unit, prepare E-3 Sentry for flight here July 28, 2020. Not only do AMU Airmen perform day-to-day maintenance, but also specialize in a wide variety of systems such as radio, navigation, radar, coolant, and computer systems. (U.S. Air Force photo by Master Sgt. Patrick OReilly)