NFL Games
Super Bowl XLVII: San Francisco 49ers vs. Baltimore Ravens
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In this Friday, Aug. 10, 2012, photo, NFL headsets appear on the San Francisco 49ers' sideline during an NFL football game against the Minnesota Vikings in San Francisco. The NFL is switching from the old analog system coaches used to relay plays to their quarterbacks and launching a network that runs on digital technology. (AP Photo/Paul Sakuma)
