This from Danny:

Came across this last night on google while searching for Chicago  engine info

Chicago O'Hare Airport ARFF unit

One of two new 4500-gallon 8×8 ARFF units for O’Hare. Oshkosh photo

and from David:

Just came across this photo of a new Oshkosh Striker 8×8 equipped with Snozzle delivered recently to O’Hare. I’m not sure, but it seems like this news may be already a few weeks old. I think this is the first 4-axle ARFF unit to serve with the CFD.