Master Sgt. Taylor Armstrong, U.S. Air Force Band Singing Sergeants conductor and vocalist, points to a sheet of music during a sound check before a concert in Redlands, Ca., Feb. 14, 2020. The ensemble performs a sound check before each concert to get a feel for the acoustics in the room and make sure everyone is in tune for their performance. (U.S. Air Force photo by Airman 1st Class Spencer Slocum)