U.S. Air Force Senior Airman Calvin Robertson, 100th Communication Squadron radio frequency transmissions technician from San Antonio, connects a speaker for the 100th Air Refueling Wing tree lighting ceremony, Dec. 6, 2013, on RAF Mildenhall, England. The radio frequency transmissions shop personnel helped set up the public address system for the Christmas tree lighting ceremony. The work center also provides support for the base wide alert system known as the "Giant Voice." (U.S. Air Force photo by Gina Randall/Released)
<br>Unit: 100th Air Refueling Wing Public Affairs
Gina Randall
Taken on 6 December 2013
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