AL ASAD AIRBASE, Iraq -- Noncommissioned officer in charge of the Join Distribution Center Sgt. 1st Class Neil Brown, Brazil, and a member of the 138th Quartermaster Support Company (right), points out the different staging lanes of the JDC to 13th Sustainment Command (Expeditionary) Command Sergeant Major, Command Sgt. Maj. Mark Joseph. Joseph visited many mission locations during his tour of Al Asad. Keeping the JDC running is just one of the missions held by the 138th Quartermaster Support Company, 751st Combat Sustainment Support Battalion, under the 96th Sustainment Brigade.