If it is in the air, maintenance put it there
U.S. Air Force Senior Airman Charles Rutledge, an aircraft propulsion system journeyman 509th Aircraft Maintenance Squadron, examines the interior of a B-2 Spirit engine at Whiteman Air Force Base, Mo., July 27, 2017. Rutledge used a borescope, which helps view areas that would otherwise not be visible. (U.S. Air Force photo/Staff Sgt. Danielle Quilla)