"I don't know this area of Chicago. Is it business or residential? I can't see a 10:00 p.m. attack if the goal is to cause maximum casulties. 10:00 a.m., but not 10:00 p.m."
I don't know the Chicago area that well either. It said "near downtown", close enough. The suitcase shielding from x-rays would suggest a certain weapon. I don't think that type of weapon cares what time of the day it is.
I don't know if AQ has got "them" or not. I'm leaning towards not. That said, if they use conventional weapons, timing would be important and 10 AM would be more logical.
I find the shielding part interesting, wonder if it's true, that would be intense to try and disarm, man! Thanks for pointing it out.
RE: Chicago
There are alot of apartment buildings south of the Chicago loop, both upscale and down.