Striking Chicago public school teachers and their supporters march through the streets following a rally at Union Park September 15, 2012 in Chicago, Illinois. The union representing Chicago's public ... more 

Striking Chicago public school teachers and their supporters march through the streets following a rally at Union Park September 15, 2012 in Chicago, Illinois. The union representing Chicago's public school teachers extended a strike, forcing tens of thousands of children to stay out of class for a second week less