FORT SAM HOUSTON, Texas - Soldiers from the Caisson section arrive to receive the casket during an interment Sept. 10 at the Fort Sam Houston National Cemetery. Four to six horses, harnessed in pairs, are used to pull a caisson. However, only the near or left-hand horses are ridden, so the rider has to control not only the horse he is riding but the one to the right of him " the "off horse."
(U.S. Army photo by Staff Sgt. Corey Baltos, Army North PAO)