"In the fall of 1871, Chicagoans knew they were due for the "big one" -- a massive, uncontrollable fire that would decimate the city. It had been bone-dry for months, and a recent string of blazes had nearly outstripped the fire department's already scant resources. Then, on October 8, a minor fire broke out in the barn of Irishwoman Kate Leary. A series of unfortunate mishaps and misunderstandings along with insufficient preparation and a high southwesterly...