[applause] is bob simpson, affordable housing at fannie mae. thank you, bob. bob and i also it is of south dakota, the thing we found before this panel. most likely we are the only 2 from south dakota. just a little factoid for you. we will start with les, who is a housing developer. you have been at the forefront of linking health and housing for some time and it is a unique topic for the subject matter of this summit. can you talk about how you got involved in this work and why it is important to you? >> may be about 10 years ago, we had been developing energy-efficient homes, sustainable green buildings, under the program, and my partner and i decided we wanted to ratchet it up a little bit and go for the highest achievement, and when we got to the section about indoor air quality, you look at it and you go, jesus, you think any of this stuff really works? it was pretty detailed. we didn't really know. it seemed like it made good sense. we asked them outside a school of medicine if they would be interested in doing a study, because we couldn't find any data