BALAD AIR BASE, Iraq -- Staff Sgt. Nate Harper, 332nd Expeditionary Services Squadron head librarian, places back a guide that informs readers about choices in distance learning, on a bookshelf here. The library also has College Level Examination Program and Defense Activity for Non-Traditional Education Support study guides to check out 24 hours-a-day. Sergeant Harper is deployed from Langley Air Force Base, Va. (U.S. Air Force photo/Staff Sgt. Travis Edwards)

BALAD AIR BASE, Iraq -- Staff Sgt. Nate Harper, 332nd Expeditionary Services Squadron head librarian, straightens up the magazine rack in the library here as part of her daily routine. Sergeant Harper is deployed from Langley Air Force Base, Va. (U.S. Air Force photo/Staff Sgt. Travis Edwards)

BALAD AIR BASE, Iraq -- Staff Sgt. Nate Harper, 332nd Expeditionary Services Squadron head librarian, places a book on the “free book” shelf in the library here. The library has hundreds of free books sorted by author as well as other books, DVDs and College Level Examination Program study guides to check out 24 hours-a-day, every day. Sergeant Harper is deployed from Langley Air Force Base, Va. (U.S. Air Force photo/Staff Sgt. Travis Edwards)