Master Sergeant Dustin Sheldon, a 91st Air Refueling Squadron boom operator, prepares to refuel various formations of fighter aircraft during week-long integrated training at Barksdale Air Force Base, La., Dec. 14, 2020. The 6th Air Refueling Wing and the 2nd Bomb Wing conducted the training to increase each unit’s operational capabilities. (U.S. Air Force photo by Senior Airman Christina Rios)