Air Force Band and Singing Sergeants tour the East Coast

BALTIMORE --Master Sgt. Mark Hannah, audio engineer in the U.S. Air Force Band, scans for open frequencies during a performance Oct. 22 at Northwestern High School, Baltimore, Md. The audio engineer designs and adjusts the audio product using electronics, before amplifying the final product for the audience. (U.S. Air Force photo by Air Force Senior Airman Christopher Ruano)