An E-3 Sentry from the 961st Airborne Air Control Squadron prepares to refuel with a KC-135 Stratotanker from the 909th Air Refueling Squadron July 10, 2019, during a training exercise out of Kadena Air Base, Japan. The Sentry provides all-weather surveillance, command, control, and communications in support of a free and open Indo-Pacific. (U.S. Air Force photo by Airman 1st Class Matthew Seefeldt)