Master Sgt. Eric Sullivan Jr., United States Air Force Band Force Singing Sergeants baritone vocalist, performs at the Daughters of the American Revolution Constiution Hall in Washington, D.C., Feb. 24, 2013. The Band performed with The Rouges, a Celtic rock band during their Guest Artist Series concert. (U.S. Air Force photo/ Airman 1st Class Nesha Humes)(Released)