This from Nick Neziri:
This past weekend, I was able to photograph three ARFF rigs at Gary Airport. Rescue 3 is an Oshkosh Striker 1500. Rescue 2 is an Oshkosh T1500. Rescue 6 is a Ford utility vehicle. The pictured Gary Fire Department ambulance is not normally based at the airport, but was placed there on a special assignment as the airport was being used to stage the aerial portion of the Chicago Air and Water Show.-Nick Neziri