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Passengers sit in a train and wait for power to be restored at a railway station, in New Delhi, India, Monday, July 30, 2012. The electricity grid across northern India failed Monday, leaving hundreds of millions of people without electricity in one of the worst power failures of the past decade, officials said. (AP Photo/Rajesh Kumar Singh)

Blackout in India

Half of India's 1.2 billion people were without power on July 31 as the grids covering a dozen states broke down. More than 600 million people were left without power in one of the world's biggest-ever blackouts.