Not your typical aircraft passengers
Staff Sgt. Wilfredo Zelaya, 22nd Aircraft Maintenance Squadron flying crew chief, looks through flight-inspection-work cards Jan. 30, 2014, aboard a KC-135 Stratotanker assigned to McConnell Air Force Base, Kan. Flying crew chiefs come from various maintenance career fields and travel with aircrew to keep aircraft mission-ready. (U.S. Air Force photo/Airman 1st Class John Linzmeier)