Minnapolis, Minn., native Spc. Bryan Carlson, tower guard, Battery A, 1st Battalion, 21st Field Artillery Regiment, 41st Fires Brigade, practices defensive moves after being sprayed with oleoresin capiscum during a class at Camp Bucca, Iraq, July 28, 2008. Carlson, who missed the battalion's training at Fort Bliss, Texas, said the spray is similar to spending six hours in a nuclear, biological and chemical training chamber.