Airman 1st Class Corey Frey, 28th Communications Squadron client systems technician, disassembles a computer tower while troubleshooting a central processing unit at Ellsworth Air Force Base, S.D., April 4, 2012. Client systems technicians are responsible for assisting customers with account and computer problems, and ensuring uninterrupted computer-based operations on base. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)