LANGLEY AIR FORCE BASE, Va. -- Staff Sgt. Nate Harper, 1st Services Squadron lodging clerk, used her spare time away from her 12-hour library job to volunteer at the hospital at Balad Air Base, Iraq. March 20, 2008, marks the five year anniversary of the United States' involvement in Iraq. (U.S. Air Force photo/Airman 1st Class Chase Skylar DeMayo)