Three-year-old Peter Araiza prepares to march with his father Francisco in a May Day demonstration May 1, 2009 in Chicago, Illinois. The march had been threatened with cancellation over concerns about the risks associated with the recent outbreak of swine flu. (Photo by Scott Olson/Getty Images)
Three-year-old Peter Araiza prepares to march with his father Francisco in a May Day demonstration May 1, 2009 in Chicago, Illinois. The march had been threatened with cancellation over concerns about the risks associated with the recent outbreak of swine flu. (Photo by Scott Olson/Getty Images)
Three-year-old Peter Araiza prepares to march with his father Francisco in a May Day demonstration May 1, 2009 in Chicago, Illinois. The march had been threatened with cancellation over concerns about the risks associated with the recent outbreak of swine flu. (Photo by Scott Olson/Getty Images)