Boom operator reaches 5,000 flying hours
Tech. Sgt. Daniel McCrillis, 350th Air Refueling Squadron operations superintendent and boom operator, performs a preflight check Dec. 14, 2017, at McConnell Air Force Base, Kan. The preflight check ensured the crew and passengers were able to safely complete their mission while airborne. (U.S. Air Force photo by Airman 1st Class Alan Ricker)