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mkzhang: DSC_0311 Sales on the Christmas
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mkzhang: DSC_0297-1 Bystander and Doorman at Union Square.
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mkzhang: DSC_0294-1 2010 Christmas in SF.
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mkzhang: DSC_0301-1 Foot traffic of holiday shopping on 2010 Christmas day
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mkzhang: DSC_0386-1 Ice rink at Union Square @ San Francisco