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The Chicago World’s Fair was also the place where most Americans first saw postcards, fiberglass, the zipper, the ice cream cone, Cracker Jack, Quaker Oats, Shredded Wheat, belly dancing, spray paint, the Pledge of Allegiance, and the Ferris wheel… In its half-year of existence, it drew 27 million visitors, or about half the American population at the time.Chicago, 1892
