U.S. Air Force Senior Master Sgt. Roarke Singer, the

U.S. Air Force Senior Master Sgt. Roarke Singer, the radio frequency/cyber transport operations section chief for the 271st Combat Communications Squadron, Pennsylvania Air National Guard, marks an RF-radiation warning during Operation Northern Strike July 26, 2019, at the Alpena Combat Readiness Center in Michigan. The 271st CBCS spent three weeks providing tactical communications support to units participating in the joint-multinational exercise. (Courtesy Photo)