just probably hear from maybe somebody from the consultant from the fire, and the authority and mr. metta? >> maybe just to comment on what you think that you heard here today and what you think will be a possibility of going forward. >> thanks. >> jeff maddox with the fire control and you can hear me through the microphone okay? >> yes. >> i would like to see the results of the studies we have also been doing studying various ducted systems with our cfd analysis, and for the buildings that are under construction and design and i am curious to see how there are results compared with this corridor air scheme. and so i would... and one of the things that i would like to think about though, is john, you mentioned that if air or smoke has moved into the corridor and the egress problem? and i think that we could use a study to evaluate just how much smoke it takes to make that corridor untenantable and is that something that is included in your study so far. >> yes. >> i think that is a big part of it to figure out if there is an opening where the damper fails, how much time there is in the co