Spc. Ryan Halbrook uses a compass to locate coordinates.
U.S. Army Spc. Ryan Halbrook uses a compass to locate coordinates for an M109-A6 Paladin Self-Propelled Howitzer during a top gun competition on Camp Taji, Iraq, on Oct. 10, 2007. Halbrook is attached to Alpha Company, 1st Battalion, 82nd Brigade Combat Team, 1st Cavalry Division.