9x157 - Late Show with David Letterman

Trumpter Terence Blanchard sits in; in honor of David Blaine's recent stunt in which he stands on a eighty-foot platform for several days, George Clarke attempts to stand on a folding chair for the duration of the show; Dave chats with April Kleinschmidt, the sole graduate of the Class of 2002 at Harrold High School in South Dakota.