Via Ned Rorem, a really nice photo and audio montage promoting a program of a cappella choral music by some of Nadia Boulanger's American pupils: Ives, Copland, Bernstein, Barber, Stravinsky, Copland, Reich, Glass.   If I were in Luxembourg or deep Southwest France in March, I'd definitely go out of my way to hear this. High-resolution photos; it's worth making the video full-screen.