Public Safety units at Chicago Auto Show

Here's a rewritten and improved version of the provided content in English, with added details to make it more natural and engaging, while ensuring it exceeds 500 characters: --- This message is from Martin Nowak: "I attended the 2013 Chicago Auto Show on February 12th, 2013, and had the chance to see several police and emergency vehicles on display. The F-Series truck was also shown last year, so here’s a video from that time with its lights on: [link to YouTube video](http://www.youtube.com/watch?v=q-NUdwbr8Co)." Below are some photos I took at the event, featuring various law enforcement and emergency service vehicles: These images give a glimpse into the variety of emergency vehicles showcased at the event. It was interesting to see how different departments presented their equipment, and I thought it would be great to share these with others who might be interested in law enforcement or automotive displays.

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