Air Force Staff Sgt. Gary Graf, 821st Expeditionary Training Squadron cable and antenna maintenance instructor, holds the separate colors of the different fiber optic wires during class at Camp Taji, Iraq, Feb. 13. During this 42-day course the Iraqi military students learn about theories, splicing cable and the overall capabilities that fiber optics can bring to advancements. Sergeant Graf is deployed to the 821st ETS from Sheppard AFB, Texas. (U.S. Air Force photo/Master Sgt. Trish Bunting)