U.S. Air Force Tech. Sgt. Daryl Gladstein, a boom operator assigned to the 340th Expeditionary Air Refueling Squadron, refuels an F-16 Fighting Falcon over the skies of Afghanistan on Jan. 17, 2018. The 340 EARS is responsible for delivering two-thirds of all fuel to airborne receivers in the U.S. Central Command’s area of responsibility. (U.S. Air National Guard photo by Master Sgt. Phil Speck)(Portions of this image were obsured for security reasons)