From Tim Olk:

Chicago Firefighters at work

Tim Olk photo

Chicago Firefighters at work

Tim Olk photo

Chicago Firefighters at work

Tim Olk photo

Chicago Firefighters at work

Tim Olk photo

Chicago Firefighters at work

Tim Olk photo

Chicago FD Squad 5 Firefighter

Tim Olk photo

Chicago FD Squad 5 Firefighter

Tim Olk photo