This from Bill Friedrich in response to the article HERE.
I am sending you another view looking down on the operations at this fire from my collection. Indeed CFD photos. If I recall this fire was on North Michigan Ave on a very cold day. Also visible are Engine 4 waiting to lead out. Truck 19’s Pirsch ladder doing battle. Ambulance 11 running with a Cadillac. I am also guessing that is Truck 3 in the midst of the battle.