Tech. Sgt. Shawn Arnett, 437th Operations Support Squadron airfield systems technician, performs soldering techniques Jan. 27, 2016, at the command tower on Joint Base Charleston – North Auxiliary Air Field, S.C. In this process, Arnett joins two metal items by melting them together. (U.S. Air Force photo/Senior Airman Clayton Cupit)

Staff Sgt. Michael Reyes, 437th Operations Support Squadron airfield systems technician, removes the cover of a radio system Jan. 27, 2016, at the command tower on Joint Base Charleston – North Auxiliary Air Field, S.C. These radios are used for vital communication between pilots in the air and air traffic controllers in the tower. (U.S. Air force photo/Senior Airman Clayton Cupit)

Tech. Sgt. Shawn Arnett, 437th Operations Support Squadron airfield systems technician, adjusts a radio’s frequency Jan. 27, 2016, at the command tower on Joint Base Charleston – North Auxiliary Air Field, S.C. This two-man team ensures all airfield communications systems located at North Field work properly and provide any maintenance when needed. (U.S. Air Force photo/Senior airman Clayton Cupit)

Tech. Sgt. Shawn Arnett, 437th Operations Support Squadron airfield systems technician, adjusts a radio’s frequency Jan. 27, 2016, at the command tower on Joint Base Charleston – North Auxiliary Air Field, S.C. This two-man team ensures all airfield communications systems located at North Field work properly and provide any maintenance when needed. (U.S. Air Force photo/Senior airman Clayton Cupit)

Tech. Sgt. Shawn Arnett, 437th Operations Support Squadron airfield systems technician, adjusts a radio’s frequency Jan. 27, 2016, at the command tower on Joint Base Charleston – North Auxiliary Air Field, S.C. This two-man team ensures all airfield communications systems located at North Field work properly and provide any maintenance when needed. (U.S. Air Force photo/Senior airman Clayton Cupit)

Staff Sgt. Michael Reyes, 437th Operations Support Squadron airfield systems technician, reads a technical order to Tech. Sgt. Shawn Arnett, 437th OSS airfield systems technician Jan. 27, 2016, at the command tower on Joint Base Charleston – North Auxiliary Air Field, S.C. This two-man team ensures all airfield communications systems located at North Field work properly and provide any maintenance when needed. (U.S. Air Force photo/Senior airman Clayton Cupit)

Staff Sgt. Michael Reyes, 437th Operations Support Squadron airfield systems technician, reads a technical order to Tech. Sgt. Shawn Arnett, 437th OSS airfield systems technician Jan. 27, 2016, at the command tower on Joint Base Charleston – North Auxiliary Air Field, S.C. This two-man team ensures all airfield communications systems located at North Field work properly and provide any maintenance when needed. (U.S. Air Force photo/Senior airman Clayton Cupit)