Colonel James Clavenna, 437th Maintenance Group commander, renders a salute to Maj. Matthew Manns, 437th Maintenance Operations Squadron incoming commander, during the 437th MOS Change of Command ceremony at Joint Base Charleston - Air Base, S.C, June 11, 2012. Manns replaced Lt. Col. Tracey Smith as the 437th MOS commander. (U.S. Air Force photo/ Airman 1st Class Chacarra Walker)

Colonel James Clavenna, 437th Maintenance Group commander, takes the squadron guidon from Lt. Col. Tracey Smith, 437th Maintenance Operations Squadron outgoing commander, during the 437th MOS Change of Command ceremony at Joint Base Charleston - Air Base, S.C, June 11, 2012. The handing over of the guidon symbolizes the Changing of a Command. (U.S. Air Force photo/ Airman 1st Class Chacarra Walker