Spc. Harold Davis, a computer detections systems repairer with the 632nd Maintenance Company, 749th Combat Sustainment Support Battalion, 4th Sustainment Brigade, 103rd Sustainment Command, and a native of Clarksville, Tenn., upgrades a Counter Remote Control Improvised Explosive Device Electronic Warfare device, March 19, at Contingency Operating Base Adder, Iraq. CREW specialists work to keep convoy escort teams safe from remote-controlled IEDs in Iraq and Afghanistan.