U.S. Air Force Senior Airman Joseph Perry (right), from an expeditionary civil engineer squadron, loads a 155-mm illumination round into an M109 Paladin Mechanized Howitzer at Forward Operating Base Hunter, Iraq, on Jan. 27, 2009. Perry is cross-training with soldiers from Bravo Battery, 5th Battalion, 82nd Field Artillery Regiment, attached to 1st Squadron, 9th Cavalry Regiment, 4th Brigade Combat Team, 1st Cavalry Division.