U.S. Air Force Chief Master Sgt. Daniel Simpson, the 18th Air Force command chief, views Airman 1st Class Malachi Greman, a 50th Air Refueling Squadron boom operator, refueling a KC-46 Pegasus aircraft from McConnell Air Force Base, Kan., aboard a KC-135 Stratotanker aircraft, Jan. 30, 2020. The flight was the first two-and-two formation of KC-46 and KC-135 aircraft. (U.S. Air Force photo by Airman 1st Class Ryan C. Grossklag)