Thank you, Dr. Chung.
Mr. Mikoch-Gerke, you talked a bit about the standards and the steps that you've done on cleaning, etc. I just want to touch on one aspect of it. When I flew back and forth from Ottawa, I ran into a number of technicians who were saying how clean they keep the airplanes, etc., with the changing of the HEPA filters, etc., and how sanitary they are. I do believe that is the case.
You talked about fogging electrostatically. We recognize that electrostatic fogging is really getting into places where maybe the cleaners can't get into. My question really comes to another step. I realize the research is very new, but I'm just wondering if WestJet has considered ozone technology.