Observer controllers asigned to 3rd Brigade Combat Team, 25th Infantry Division, watch as engineers assigned to 3rd Brigade Special Troops Battalion, 3rd BCT, 25th ID, set a bangalore explosive device used to create a breach in the simulated enemies perimeter during a company-level combined arms live-fire exercise May 13, 2013, at Schofield Barracks, Hawaii. The exercise develops leaders and service members with critical thinking and tactical skills, while remaining prepared to support the Army's mission in the Pacific. (U.S. Army photo by Sgt. Brian C. Erickson/Released)