TF3 Chicago: More than the whole off the post office office

While Transformers 3 films in Detroit, here are more images thanks to Sam Nickelson from around July 23rd when TF3 was in Chicago at the Old Post Office Building filming. As he reported before, the building was dressed as part of the US Department of Health and Human Services and it seems they have quite the vehicle fleet as it’s not just a few trucks dressed with the logo but SUVs, cars, and big wheelers. Also, he took a few picks of the props used there including, in the first image, an odd looking gray shaped thing. If it was a part of a Transformer, I would think it would be CGI blue so not really sure what to make of it.
Download the best Action Movies here