We're going to focus on music of the 20th century this week. We'll look at ten composers, representing a tremendous variety of styles and points of view, from the ballet music of Igor Stravinsky to Samuel Barber's tribute to Soren Kierkegaard to David Wilde's paean to the Siege of Sarajevo -- and there will be plenty in-between: some will be by composers you know, but expect a few surprises this Thursday as well.