LONDON -- Former British prime minister Margaret Thatcher appeared frail yesterday as she arrived at a London chapel for the funeral of her husband of more than 50 years. The 77-year-old Thatcher was supported by her twin children, Mark and Carol, as they entered the chapel at historic Royal Hospital behind the coffin of Sir Denis Thatcher, who died June 26 at 88. The coffin, draped in the British Union Jack, was covered with with red roses and white lilies. Among the 120 mourners at the private service was Sir Denis' old friend Lord Deedes, 90, one of Britain's most...