In Hasan's living room, a crumpled prayer rug shared the floor with a paper-shredding machine. When he moved into the apartment in July, he'd put a bed in the bedroom, but he had gotten rid of the bed prior to the shooting. In a closet, near the washer and dryer and wads of Hasan's clothing, including fatigues, was a box of pill bottles. The medications included a 2001 prescription for Combivir, a drug often prescribed for doctors who may have come in contact with HIV, as well as the antibiotic Clarithromycin, a cough reliever and an antihistamine. On a card...