Hydraulics keeps the boom in order
RAF MILDENHALL, England – Staff Sgt. Marcus Lake, 100th Maintenance Squadron aircraft hydraulics journeyman, tightens a screw to calibrate the elevation transmitter on a KC-135 Stratotanker boom June 12, 2012, in the hydraulics shop here, as Senior Airman Ethan Humphries, 100th MXS aircraft hydraulics journeyman, observes. The transmitter reports to the boom operator the angle the boom is from the aircraft during refueling. (U.S. Air Force photo/Senior Airman Rachel Waller)