I was in Chicago yesterday and they were filming T3 near our hotel. They had this grassy plot about 3 storefronts wide fenced off at the corner of Randolph and Franklin. On the sidewalk was a canopy with a table full of healthy snacks and water. Lots of big trucks on both sides of the street, and they had only two lanes open. When I walked my dog earlier, security was everywhere from the Franklin Street Bridge down past Randolph, and all over Randolph as we walked back to our hotel. I didn't know what was going on until we got back to the hotel. We didn't get to see any of the action, but I think they were just getting set up, no filming yet. It was all quiet when we pulled out around 3, still set up though.