Tech. Sgt. Benjamin Polk, U.S. Air Force Band’s Airmen of Note bass trombonist, performs during a concert at the U.S. Air Force Memorial in Arlington, Va., before the fireworks celebration in Washington, D.C., July 4, 2015. The Airmen of Note is one of six U.S. Air Force Band musical ensembles that showcase a contemporary form of jazz. (U.S. Air Force photo/Airman 1st Class Philip Bryant)