Senior Airmen Steven Rosales (left) and David Fisher, 28th Maintenance Squadron avionics technicians, remove a motherboard from a central integrated test system data acquisition unit to replace guide pin sleeves at the digital analog video avionics shop on Ellsworth Air Force Base, S.D., May 9, 2012. The unit allows the B-1 bomber avionics systems to operate correctly and is secured within the B-1 by guide pin sleeves. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)