CONTINGENCY OPERATING BASE BASRA, Iraq, July 10, 2009 – Army Pfc. Dustin Clark was manning the night shift when he heard the warning system go off. Army Pfc. Dustin Clark calibrates the sights on a radar system at Contingency Operating Base Basra, Iraq, June 28, 2009. Clark and other members of Echo Battery, 4th Battalion, 5th Air Defense Artillery Regiment, out of Fort Hood, Texas, detect mortar and rocket attacks. U.S. Army photo by Pfc. J. Princeville Lawrence (Click photo for screen-resolution image);high-resolution image available. Clark -- a counter rocket, artillery and mortar, or C-RAM, systems operator -- has watched the...