Willie Robertson, TV star on Duck Dynasty, left, and Gen. Martin E. Dempsey, the 18th Chairman of the Joint Chiefs of Staff, right, sing Christmas songs to the troops during the United Service Organizations show at Kandahar Airfield, Afghanistan, Dec. 10, 2013. (U.S. Army photo by Sgt. Eric Glassey)
<br>Unit: ISAF Regional Command South
Sgt. Eric Glassey
Taken on 10 December 2013
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