What happens when two lifelong Shakespeareans attend Verdi's "Macbeth" at the Met? Marc Eliot Stein examines Giuseppe Verdi's earliest Shakespeare opera with Meg Wise-Lawrence, who teaches English at Hunter College and City College in New York City. We talk about witches, prophecies, banquets, mad scenes, Ian McKellen, Italian nationalism, the Scottish people, Verdi's "Nabucco", Verdi's "Otello" and Tchaikovsky's "Queen of Spades".