Air Combat Command Heartland Band of America's New Horizons, a clarinet quartet, performs Christmas carols in the foyer of the Fire Station on Ellsworth Air Force Base, S.D., Dec. 15, 2011. The troupe traveled around base for two days performing at various locations spreading holiday cheer and thanking Airmen for their hard work. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)