May 1, 2012 (29 images)

Updated: May 3, 2012 at 5:11 PM
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Demonstrators march through the streets on May 1, 2012 in Chicago. Marchers voiced their support for workers' rights and immigration reform and spoke out against corporate greed and Wall Street as part of International Workers Day, a commemoration of the 1886 Haymarket Riot in Chicago. UPI/Brian Kersey
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