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Osan Air Base, Republic of Korea -- U.S. Air Force Airman 1st Class Demarius Fowler, 51st Communications Squadron radio frequencies system technician, system checks an AV-2040-3 tactical satellite communication antenna at Osan Air Base, Republic of Korea, Nov. 17, 2016. Fowler is part of the transmissions systems flight, which maintains radios frequencies and public address systems.