francisco i'm a commercial real estate broker several years ago at the request of airport director john marty served on a parental panel to explore the terminal 2 the observe was to take advantage of the time and make it more meaningful for the restaurant needs for travelers. with other real estate brokers i participated in mapping 45 places the neighborhood vacancy factor was 4.8 there are 5 hundred chain stores of 36 percent are founded or based in san francisco and/or the greater bay area. approximately 44 percent is devoted to restaurant and speciality food shops and bars and stores and just around 3 percent or one hundred and thirty branches is accompanied by banks that are formula retail under san francisco's defines. everyone agrees that san francisco is special and that the unique character it is a benefit, however, we can't predicted e predict or anyone else who is going to vicinity a new practice or how our shopping partners will change part of it makes san francisco the basing place we ask people to contribute to circumstances. as a community we want to encourage the creativity and

marty mack careerry, professor of public health at johns hopkins. na, and marti, welcome to both all of you. dina, you're not surprised from 98% success from the dogs in this italian study? >> i'm not surprised at all. dogs have been showing throughout time with search-and-rescue, bomb detection, explosives detection, now with cancer the results have been tremendous. there hasn't been enough research produced but the research that's out there is tremendously promising. that is the detection of most canners. jon: there is really dina, a smell to cancer, a smell soothed with it? >> there has to be a smell. if the dogs are finding it there is a smell. smell associated with with disease has been going on since the beginning of time. dated back to chinese medicine. there are certain smells associated with certain disease. you will see it in diabetes. you will see it in other diseases even latter stage cancers there is odor detectable by humans in latter stages. jon: dr. makary, the fact there is an odor admit -- emitted by cancer, you say that may give us