AF Band Holiday Concert
The U.S. Air Force Band men’s chorus performs the 12 Days of Christmas during a holiday concert Dec. 15, 2013, at the Smithsonian National Air and Space Museum, Udvar-Hazy Center, Chantilly, Va. Thousands of visitors to the museum attended the concert after seeing the Air Force Band’s viral video on the internet of a “flash mob” at the Air and Space museum on the National Mall. (U.S. Air Force photo/Staff Sgt. Carlin Leslie)

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Photo by: Staff Sgt. Carlin Leslie |  VIRIN: 131215-F-QZ836-034.JPG