U.S. Air Force Staff Sgt. Dandrick Glenn, Pennsylvania Air National Guard Band of the Northeast trombone player, performs during a Christmas Festival concert held at Upper Dauphin Middle School in Lykens, Pennsylvania, Dec. 2, 2017. The band played an hour and a half-long show and invited the middle school students to play with them. (U.S. Air National Guard photo by Senior Airman Rachel Loftis/Released)