Article Photos: Documents: Worries about outage before Super Bowl

Baltimore Ravens players look around the Superdome after the lights went out during the second half of NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)

Baltimore Ravens players look around the Superdome after the lights went out during the second half of NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Matt Slocum)