Tech. Sgt Robert Holyoke (left), 28th Munitions Squadron support equipment technician, and Tech. Sgt Christopher Shields, 28th Munitions Squadron trailer maintenance NCO in charge, adjust brake pads on a munitions trailer during a brake bleeding process at Ellsworth Air Force Base, S.D., Feb. 7, 2013. The 28th MUNS is responsible for the maintenance and upkeep of more than 175 munitions trailers on base. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)