U.S. Army Lt. Col. David D. Dean, left, commander of

U.S. Army Lt. Col. David D. Dean, left, commander of the 157th Combat Sustainment Support Battalion and Master Sgt. Robert F. Harris, the acting senior enlisted adviser, roll their colors signifying the transfer of their duties to the 77th Combat Sustainment Support Battalion, Sept. 1, 2013, at Bagram Airfield, Parwan province, Afghanistan. (U.S. Army photo by Sgt. Sinthia Rosario/Released)