Riders staged at the Visitors Center for the briefing for this mission and to assure the busy schedule for the morning had all missions covered.  Riders were notified that this mission's shelter had been changed to D.  This required that a truck go to shelter A and get 12 flags for shelter D.  Those flags would be returned to A after this mission completed.  Our next mission would be in A.  Two Honor Bikes were assigned and the riders went to prepare the flag line.  At the conclusion of the service the riders then moved to shelter A.