copyright 2009, The Washington Post A 21-year-old Army private on her way from Iraq to Chicago for a leave after learning that she was pregnant with her first child. A 56-year-old psychiatric nurse for the San Diego County government who had just spent three years persuading a review board for the National Guard to let him return to active duty, despite his hearing loss. A 29-year-old sergeant from rural Wisconsin who dropped her social work studies the week after Sept. 11, 2001, to enlist in the military. These are among the dozen soldiers and one civilian who were killed Thursday in a hail of gunfire at Fort Hood, Texas. Here are stories of many of the dead, as told by their families and friends. 