Less than a week before her son would launch his horrifying attack on Sandy Hook Elementary School, gun-loving mom Nancy Lanza knew "she was losing him" and that "he was getting worse." -snip- Adam, who the coroner's office said Sunday shot Nancy Lanza, 54, several times in the head before unleashing a nightmarish attack that killed 20 schoolchildren and six others Friday, was prone to hurting himself, the drinking buddy said. "Nancy told me he was burning himself with a lighter. In the ankles or arms or something," he recalled of a conversation they had about a year ago. "It...