180329-Z-JU667-0051
U.S. Air Force Staff Sgt. Joshua Foster, a radio frequency transmissions technician with the 379th Operations Support Squadron, uses a controller to move a satellite dish into position for maintenance at Al Udeid Air Base, Qatar, Mar. 30, 2018. Silent Sentry protect critical satellite communication links by employing multiple weapons systems for electronic warfare. (U.S. Air National Guard photo by Master Sgt. Phil Speck)