Participants of Critical Mass dressed up in costumes for their Halloween bike ride on Oct. 28, 2011. Critical Mass is a bike ride that takes place in Chicago on the last Friday of every month. The ride leaves from Daley Plaza at 5:30p.m. to the sounds of blow horns, bells and yelling of “lets mass!” On Oct. 28, 2011 the Critical Mass route passed by the Chicago Federal Reserve located at 230 South La Salle Street to show their support. The bike riders were greeted with signs and chanting from the Occupy Chicago group. | Sara Mays THE CHRONICLE

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