Tech Sgt. Emily Snyder, United States Air Force Concert Band English hornist, begins playing the traditional English Folk song, “Greensleeves”, at the Smithsonian National Air and Space Museum Udvar-Hazy Center in Chantilly, Va., Dec. 2, 2014. The band conducted a flash mob to promote their free, upcoming holiday concerts in the National Capital Region. (U.S. Air Force photo/ Staff Sgt. Devon Suits)