U.S. Marine Corps Lance Cpl. Tyler J. Krahulec, comptroller, Headquarters and Support Company, Headquarters Battalion, 1st Marine Division (1ST MARDIV), receives a class on night firing during Exercise DESERT SCIMITAR aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., April 30, 2013. Exercise DESERT SCIMITAR was conducted to test and train 1ST MARDIV's command and control capabilities in scenarios representative of battlefield conditions. (U.S. Marine Corps Photo by Lance Cpl. Devin G. Jantzi, 1st Marine Division Combat Camera / Released)