NEW YORK (Reuters) - The estranged wife of Robert F. Kennedy Jr. died from asphyxiation due to hanging, an autopsy revealed on Thursday, in an apparent suicide at the family's suburban New York home. A spokeswoman for the Westchester County Medical Examiner's Office, Donna Greene, said the autopsy performed on Mary Kennedy, 52, revealed she died of suffocation. "The cause of death was put at asphyxiation due to hanging," Greene said. Results of toxicology tests would not be ready for several months, she said. ...