I join with Mr. Woodworth in saying this is a very excellent panel. You're also very depressing. I'm thinking about, was it Pogo who said, “We have met the enemy...and he is us”. That is, in some respects, the political problem we have here, that it's us. There is no bad guy out there doing it; a whole bunch of things are going on.
Dr. Bruce, at the end of your presentation you talked about ozone treatments being put in the sewers, but you didn't expand on that. What does that mean and what's the significance of that?