The U.S. Army Concert Band accompanied trombonist Gracie Potter for a performance of Colors by Bert Appermont at The U.S. Army Band 2025 American Trombone Workshop; COL Bruce R. Pulver, conducting. #DetroitSymphony #DSOLive #DSO #ArmyBand #ConcertBand #Band #TUSAB #ArmyMusic #MilitaryMusic #Trombone #ATW2025 #ATW #Music