Staff Sgt. Kevin Gimenez, 197th Air Refueling Squadron boom operator, guides a boom while refueling an F-35A Lightning II assigned to the 56th Fighter Wing April 17, 2020, over Colorado. While riding in a KC-135 Stratotanker, boom operators pump thousands of pounds of fuel into aircraft throughout flight. (U.S. Air Force photo by Airman 1st Class Brooke Moeder)