B-1B Hydraulics
Senior Airman Andrew Knill, 28th Maintenance Squadron hydraulics specialist, tightens safety wire to secure a bolt on a B-1B integrated servo actuator during a maintenance inspection at Ellsworth Air Force Base, S.D., Feb. 2, 2012. Safety-wiring reduces the risk of bolts vibrating loose during aircraft operations, eliminating potential mechanical failure and foreign object debris. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)