Cars drive through Paulista Av. in Sao Paulo during a blackout Tuesday, Nov. 10, 2009. Brazil's Minister of Mines and Energy Edison Lobao said a massive power failure that threw Brazil's two largest cities along with other parts of the country into darkness Tuesday night affecting millions of people, after the huge Itaipu hydroelectric dam suddenly went offline. Power was restored in some areas of the city, more than two hours after it went out. (AP Photo/Andre Penner)