This from Asher Heimermann:

The Chicago Fire Department’s Air Sea Rescue Unit made an appearance at the Chicago Air & Water Show on Sunday, August 16th at North Avenue Beach.

The Chicago Police Department’s Marine & Helicopter Unit also made an appearance.
Asher Heimermann
Chicago PD Air Sea Rescue demonstration

Asher Heimermann photo

Chicago FD Air Sea Rescue demonstration

Asher Heimermann photo

Chicago FD Air Sea Rescue demonstration

Asher Heimermann photo

Chicago FD Air Sea Rescue demonstration

Asher Heimermann photo