Airmen, Soldiers open lines of communication
BAGHDAD, Iraq -- Senior Airman Dennis Knaack uses a backhoe to dig a trench for new ductwork that will house fiber optics cable here. Airman Knaack is assigned to the 447th Expeditionary Communications Squadron and is deployed from the Minnesota Air National Guard's 210th Engineering and Installation Squadron. (U.S. Air Force photo by Tech. Sgt. Brian Davidson)