BALAD BIG TOP U.S. Air Force Staff Sgt. Karl Ferree and Senior Airman James Robison ride in a bucket truck to position lead ropes on a big top shelter at Balad Air Base, Iraq, May 7, 2008. The shelter can house various aircraft and equipment. Ferree is deployed from Luke Air Force Base, Ariz., and Robison is deployed from Malmstrom AFB, Mont. Both are structural engineers assigned to 332nd Expeditionary Civil Engineer Squadron. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 158910-P-VTT82-687.jpg Photo Gallery