Filmmaker Ken Burns charts the development of a true American art form, jazz, in this 10 part series. In this seventh program the changes World War II brings to jazz are explored, through the works of Glenn Miller, Artie Shaw, Django Reinhardt, Duke Elli ngton, Billy Strayhorn, Dizzy Gillespie and Charlie Parker. DVD includes " C-Jam Blues " with Duke Ellington. Closed captioned.