Wade into the endless smoke of Chicago's Union Stock Yards, the site of nearly three hundred extra-alarm fires before its closure in 1971, including some of the most disastrous conflagrations of a city famous for fire. In 1910, twenty-one firemen and three civilians were killed in a blaze at a beef warehouse--the largest death toll for an organized fire department in the nation prior to 9/11. The meatpackers who ran the yards considered the constant...