Master Sgt. Edward Soto, 344th Air Refueling Squadron boom operator, left, follows an air refueling checklist over the skies of Oklahoma, Feb. 28, 2019. Master Sgt. Devin Kay, 344th ARS instructor boom operator, watched as Soto ran through the checklist according to Boeing and Air Force rules of operation for the new aircraft accepted Jan. 25, 2019. (U.S. Air Force photo by Staff. Sgt. David Bernal Del Agua)