NEW ORLEANS (Reuters) – The National Football League, the Superdome and a utility investigating the cause of a power outage at one of the world's most watched and meticulously planned events, on Monday exonerated the halftime show from blame in the Super Bowl mishap. With more than 108 million Americans watching along with television viewers in 180 countries, about half the stadium lights went dark early in the second half of the game, in which the Baltimore Ravens defeated the San Francisco 49ers, 34-31. …
