Airman 1st Class Conner Tolley, 28th Maintenance Squadron hydraulics technician, loosens brake housing pistons during disassembly at Ellsworth Air Force Base, S.D., May 11, 2012. When any problems occur with B-1 brake systems, they are disassembled, inspected, fixed, reassembled and extensively tested before being reinstalled. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)