A Drill sergeant candidate at the United States Army Drill Sergeant Academy located at Fort Jackson, S.C., takes a moment to cool down in the arms immersion water tank after completing the fit-to-win endurance obstacle course, June 17. Candidates from the U.S. Army, Army Reserve and National Guard spend 63 training days in the course preparing to become drill sergeants for the Army's four basic combat training posts. (U.S. Army photo by Sgt. 1st Class Brian Hamilton/ released)