This from Chi-Town Fire Photos:
I took a short ride into the city and went to a working fire in the 20th battalion at 1502 w 79th street. Companies had a 3-sty ordinary vacant building with a fire on the 2nd floor. Engines 129 and 101 lead out lines and Truck 50 & 41 members made the roof. I arrived right after the first-in company. The full gallery is on my site.