Join us at 2PM for our weekly broadcast from Austria's Salzburg Festival. Today's artists are the Simon Bolivar Quartet - an internationally renowned product of "El Sistema," the Venezuelan charity that uses classical-music training to "rescue young people in extremely impoverished circumstances." On the program is Ravel's gentle String Quartet, Shostakovich's powerful Eighth Quartet, and more - including some encore Mozart from pianist Alfred Brendel.