DOVER AIR FORCE BASE, Del. -- Former 512th Airlift Wing Vice Commander Col. David Wuest presents Chaplain (Lt. Col.) John Groth with his retirement certificate during a ceremony Feb. 7, 2009 at the Air Mobility Command Museum here. Chaplain Groth is the keynote speaker at the Delaware National Guard's second annual Unity Day on Aug. 10, 2011. (U.S. Air Force photo/Staff Sgt. Steve Lewis)