First Lt. Joshua Frilling, 319th Logistics Readiness Squadron, plays the trumpet during a performance with Tops in Blue on Dec. 7, 2009, at the Charles Fritz Auditorium in Grand Forks, N.D. Lieutenant Frilling is on permissive temporary-duty assignment, while performing with Tops in Blue. Tops in Blue is an all-active duty U.S. Air Force special unit made up of amateur performers selected for their entertainment abilities. (U.S. Air Force Photo/Staff Sgt. Suellyn F. Nuckolls)