Master Sgt. Loren Zimmer, U.S. Air Force Band audio engineer, works with the technical aspects of the band’s sound during their performance at the Strathmore Theatre in Bethesda, Md., Dec 1, 2015. The Air Force Band is the Air Force’s premier musical organization. The excellence demonstrated by the Band’s Airmen is a reflection of the excellence carried out 24 hours a day by Airmen stationed around the globe. (U.S. Air Force photo/ Airman 1st Class J.D. Maidens/ released)

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