Tech. Sgt. Shane Williams, 203rd Air Refueling Squadron boom operator, refuels an F-16 Fighting Falcon from Tulsa Air National Guard Base in Tulsa, Okla., during the Sentry Aloha exercise at Joint Base Pearl Harbor-Hickam, Hawaii, Aug. 27, 2019. Aircraft from around the world took part in Joint Exercise Sentry Aloha, a three-week coalition exercise. (U.S. Air National Guard Photo by Airman First Class Adam Smith)