Among America's greatest treasures is John Philip Sousa, "The March King." The music of this beloved bandleader and composer, whose most prolific period straddled the turn of the 20th century, continues to fill hearts with a wave of national pride and patriotism. Sousa's "The Stars and Stripes Forever" is, in fact, the national march, and his creative medium, the marching band, has become an American institution.