Senior Airman Jeffrey Sales, 2nd Communications Squadron airfield systems technician, unscrews a panel on Barksdale Air Force Base, La., June 17, 2013. The 2nd CS airfield systems technicians maintain the communication systems which are used to keep aircraft flying in and out of Barksdale. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Christopher Ries, 2nd Communications Squadron airfield systems technician, checks the voltage on a communication system on Barksdale Air Force Base, La., June 17, 2013. A voltmeter is used to check the power of equipment to ensure it is working correctly. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Christopher Ries, 2nd Communications Squadron airfield systems technician, inspects wires for serviceability on Barksdale Air Force Base, La., June 17, 2013. The 2nd CS airfield systems technicians maintain the communication systems which are used to keep aircraft flying in and out of Barksdale. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Jeffrey Sales, 2nd Communications Squadron airfield systems technician, uses an AM48 to test the phone line serviceability at the Air Traffic Control tower on Barksdale Air Force Base, La., June 17, 2013. The tower uses its own internal communications systems which 2nd CS airfield systems technicians maintain. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Jeffrey Sales, 2nd Communications Squadron airfield systems technician, checks the line quality of a telephone line at the Air Traffic Control tower on Barksdale Air Force Base, La., June 17, 2013. The tower uses its own internal communications systems which 2nd CS airfield systems technicians maintain. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Christopher Ries, 2nd Communications Squadron airfield systems technician, tests the functionality of the tactical air navigation system on Barksdale Air Force Base, La., June 17, 2013. The TACAN tells aircrew personnel how far away they are from Barksdale and is used as a global positioning satellite. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)