Think you know Chicago? Ifyou are thinking of Al Capone, the L, the Cubs, Barack Obama or the Great Fireof 1871, then you are remembering the highlights from the tour bus. Herea s therest of the story, day by day. Chicago opened the first blood bank, inventedthe vacuum cleaner and sent a bowling ball around the world. One high schoolfootball game drew 120,000 people. Chicagoans fought nineteen years over thename of a street. For fifty years, they saved a gallows for an escaped killer.And those are just some of the stories.