caption: U.S. Air Force Staff Sgt. <PERSON>, a <PERSON> crew chief, and U.S. Air Force Staff Sgt. <PERSON>, a defensive space control maintainer, both with the 379th Expeditionary Operations Support Squadron, use a control pad to redirect an antenna at Al Udeid Air Base, Qatar, Jan. 30, 2017. These antennas are an Operation Silent Sentry asset and help find and locate electromagnetic interference in the U.S. Central Command area of responsibility. (U.S. Air Force photo by Senior Airman <PERSON>)
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