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In this Dec. 20, 2011 photo, commuters move past congested houses built close to each other in India's most crowded northeast district of New Delhi, India. If a major earthquake were to strike India's seismically vulnerable capital, this neighborhood, home to 2.2 million people and India's most crowded district, would likely collapse into an apocalyptic nightmare. (AP Photo/Manish Swarup)

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