Staff Sgt. Eric Smith, 28th Maintenance Squadron repair and reclamation technician, removes safety wire from a wing sweep angle drive gearbox during isochronal inspection at Ellsworth Air Force Base, S.D., April 10, 2012. This gearbox allows the wings on the B-1 to adjust for flight at high speeds. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)