This from Josh Boyajian:

I had a great opportunity yesterday and got pictures of the (2) new ARFF crash trucks at O’Hare Airport. They are the new generation 2016 Oshkosh Strikers assigned to units 6-5-4 and 6-5-8. Enjoy
Chicago FD ARFF 654

Josh Boyajian photo

Chicago FD ARFF 654

Josh Boyajian photo

Chicago FD ARFF 654

Josh Boyajian photo

Chicago FD ARFF 658

Josh Boyajian photo

Chicago FD ARFF 658

Josh Boyajian photo

ARFF units at O'Hare Airport

Josh Boyajian photo