** FILE ** Italian tenor Giuseppe di Stefano holds the hand of soprano Maria Callas on the stage of Carnegie Hall, in New York City, after both participated in the Metropolitan Opera’s guild benefit concert, in this March 5, 1974 file photo. Di Stefano, one of the greatest tenors of the 20th century and a celebrated singing partner of Callas, died at his home near Milan, Italy, Monday, March 3, 2008. He was 86. (AP Photo/File)
