U.S. Air Force Staff Sgt. Christopher Walker, 691st Cyberspace Operations Squadron noncommissioned officer in charge of infrastructure management, discusses operations within his section at Ramstein Air Base, Germany, Apr. 1, 2020. The 691st COS is responsible for network administration for all bases and geographically separated units within U.S. Air Forces in Europe-Air Forces Africa command or theatre. (U.S. Air Force photo by Staff Sgt. Devin Nothstine)