Dave Grohl chats with Dr. John, Allen Toussaint, Cyril Neville and Trombone Shorty about New Orleans' unique history, 'jazz funerals,' Mardi Gras Indians, and the effects of Hurricane Katrina. Meanwhile, Dave bonds with Ben Jaffe, scion of a famous j... (more)azz family and leader of the legendary Preservation Hall Jazz Band, before recording the latest Foo Fighters song at the venue.