Corporate sponsorships, nationally televised games, minute-by-minute coverage on sports websites -- for players, parents and coaches, high school football has never been bigger. But is enough being done to ensure players' safety as the intensity of the sport grows? In Football High, FRONTLINE investigates the new face of high school football. FRONTLINE centers its investigation in Arkansas, where two players collapsed from heatstroke last year while practicing during one of the hottest summers on record. The program also investigates the estimated 60,000 concussions suffered each year by high school football players.