The show started late (about a half hour) as well due to issues with the city. I had a VIP package and we ended up starting over two hours late due to issues with the fire marshal. After sound check and the Q&A the city wanted them to stop the meet and greet / photo op portion as well saying people had to have their seats (again it's an outdoor venue on an island where it wasn't crowded and no real issue with people being outside) so instead of cancel anything they brought the remaining VIPs backstage so that we could do our photo ops there while the rest of the audience trickled in (also meaning that VIP time was cut short and we never got some of the perks like private merchandise shopping).
Basically the entire thing was a fuck up of epic proportions, a lot of which involved the city of Chicago. The sound on the video didn't come out that great but I was right in the front (second row) so we could hear the guys really clearly when they were talking to us. Kevin said that in 20 years they've never been shut down before. It got crazy when we were exiting with some fans refusing to leave, yelling at cops, and some people even rushed the gate by the buses. I tried to get a shot of some people being arrested but the lights kind of messed it up. Also this post would be more coherent if I wasn't seething right now.
Source: Me and my camera. The video quality will improve... YouTube is still processing this so it's a little iffy at the moment.