Thank you very much.
I appreciate your testimony this afternoon. We appreciate it when you do come, and it's great to see you here.
I have just a couple of questions, and I'll begin with the whole issue of the $4 billion that's bandied about in terms of the perceived or the actual cost to retrofit the buildings. Specifically, because we know now that there are so many buildings, what type of buildings are the worst? Are we looking at lighthouses that are in disrepair and currently aren't being used, or are we talking about office buildings that have the majority of this deficit?