SIOUX FALLS, S.D. - Brig. Gen. Steven Warren, Assistant Adjutant General for Air, HQ SDANG, administered the oath of office to Brig. Gen. Joel DeGroot, during a transfer of authority ceremony at Joe Foss Field April 1st. DeGroot previously served as the 114TH Maintenance group commander. (U.S. Air National Guard photo by Staff Sgt. Duane Duimstra/Released)