ELLSWORTH AIR FORCE BASE, S.D. - Staff Sgt. Brandon Roel (left), 28th Maintenance Squadron non-destructive inspection technician, and Senior Airman Evan Bryant (right), 28 MXS NDI technician, calibrate Eddy Current Equipment, Sept. 2. Sergeant Roel and Airman Bryant prepare to conduct a routine inspection on a B-1B Lancer landing gear wheels. (U.S. Air Force photo/Senior Airman Kasey Close)