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A power failure advisory appears on a screen at the Superdome during the second half of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. The power failure delayed the game by more than 30 minutes. (AP Photo/Marcio Sanchez)

Associated Press
A power failure advisory appears on a screen at the Superdome during the second half of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. The power failure delayed the game by more than 30 minutes. (AP Photo/Marcio Sanchez)
A power failure advisory appears on a screen at the Superdome during the second half of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. The power failure delayed the game by more than 30 minutes. (AP Photo/Marcio Sanchez)
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