Patricia Kennedy Lawford, the sister of President John F. Kennedy and wife of actor Peter Lawford, died at her New York home of complications of pneumonia on Sunday, according to a family statement. She was 82. "My sister Pat is irreplaceable," Massachusetts Democratic Sen. Edward M. Kennedy (news, bio, voting record) said in a statement. "Everyone who knew Pat adored her. She was admired for her great style, for her love and support of the arts, her wit and generosity — and for the singular sense of wonder and joy she brought into our lives." Lawford is survived by four...