Senior Master Sgt. Dennis W. Hoffmann, U.S. Air Force Concert Band percussionist, plays on a drum kit during the Guest Artist Series at the Rachel M. Schlesinger Concert Hall and Arts Center in Alexandria, Va., Jan. 18, 2018. The GAS is an opportunity for band members to show the level of proficiency they have on their instrument by playing with a guest artist. (U.S. Air Force photo by Airman Michael S. Murphy)