When John came back from Iraq, he refused to leave his house. He was paranoid. He had violent nightmares—the same ones every night. He was haunted by the killing he'd done. Unlike a lot of vets, John got treatment. The people at the Veterans Affairs clinic started to feel optimistic about his case. And then John attacked his fiancée and her mother. This and other stories of people who've come face to face with death and are struggling to move on.