Band contests push teens to their limits By Jennifer Maberto, 14, Chris Reissaus, 14No one doubts that high school football players work hard: They practice most of the summer despite the heat, preparing for a season culminating (they hope) in regional and state contests. Not everyone realizes, however, that marching bands work just as hard and are just as competitive as football teams. Casey Turner, 17, St. Peters, Mo., described a typical marching band contest: "It's just teena