American student Amanda Knox flew home free on Tuesday after spending four years in an Italian jail, leaving the family of murdered British student Meredith Kercher racked with anguish that they are no closer to the truth about her killing. Knox, cleared of the murder by an appeals court on Monday night, left Rome shortly before midday for London where she and her family were boarding a connecting flight to their home in Seattle, airport officials said. The 24-year-old broke down sobbing and nearly collapsed with emotion on Monday night after an appeals court in Perugia ruled she and her...