More about the 2-11 alarm fire in Chicago on July 20, 1971, shared by Steve Redick: July 20, 1971 – 4540 Thomas Tanker truck explosion Photographer unknown This historical event took place on July 20, 1971, in Chicago. The incident involved a tank truck explosion at 4540 Thomas Street, which was reported under a 2-11 alarm. These types of alarms typically indicate a serious or large-scale emergency. While the exact cause of the explosion remains unclear, it is known that the incident drew significant attention from local authorities and emergency services. The photo attached here, though without a known photographer, captures a moment from this tragic event. It serves as a reminder of the dangers faced by firefighters and the importance of safety protocols in such situations. Additionally, there are more images available in the gallery below, which may provide further insight into the scene and the response efforts that followed. If you're interested in viewing a slideshow of these images, you can click the "Show slideshow" link above. These photos are valuable historical records that help preserve the memory of events like this for future generations. Chemical Mixing Machine,Chemical Blending Machine,Liquid Chemical Mixing Machine,Chemical Powder Mixing Machine Jiangyin Xinda Medicine and Chemical Machinery Co.,Ltd , https://www.xinda-china.com