Iraqi prisoners could lift their cell doors right off their hinges. One senior sergeant whiled away his evenings blasting grazing sheep with a guard-tower machine gun. U.S. commanders didn't bother telling their troops they'd be stuck in Iraq for months more than advertised. The only woman commanding general in the war zone, Abu Ghraib prison chief Janis Karpinski, has written a memoir of her fateful year there, a candid portrait of an often dysfunctional U.S. Army - of "Sergeant Bilko meets Catch 22," as she puts it. The book, "One Woman's Army," published by Hyperion, sheds little new light on...