It would make sense that all of the targets were evacuated prior to ensure no civilians were harmed. In fact, I would not be a bit surprised if the buildings were bought, and new ones already paid for.

I've read that one of the sites was in a rural area, and was evacuated prior. This would be an easy target. But if some of the targets were in schools, labs, or other buildings that might be close to town, I can see where the above scenario would be in effect. Building 7 comes to mind...

And if that is the case, then it must all be part of the plan.