all of these companies so lono, silva techs, 10 rat, and watt, those are the four companies that will introduce themselves. i'm excited to be the mayor right now because this is the start of many, many other names that you're going to mispronounce like i did, because when they start out, they haven't gotten the cool names yet. they will evolve their cool names to introduce themselves to the rest of the world. and when they do, watch out. the clean tech industry will grow like the dickens. they'll really accelerate. because everybody is looking now for how to reduce emissions, how to really contribute seriously to our environment, making a better place. that's what san francisco is. we're going to use this innovation but we're going to also invite them in the most responsible thing that these young folks want to do and that is to save our planet, save our energy, reduce carbon emissions, be part of the smartest city in the world to do better. it's our urban settings that will contribute significantly in the next few decades. whether or not we're going to survive as a better planet and

. >> host: one of the most horrific antedotes is the siege of lono thrks grad and sawing off the leg of her husband to feed the family. it's horror. >> guest: we are now just getting to grips with this. they are not state secrets, but a lot of wonderful material in russia, and i have terrific russian researcher who comes up with wonderful stuff. you are suddenly getting accounts surfacing by russians and what happened to them because after the war, stalin wanted the world to believe that the people had survived their siege through heroism, and, of course, it was not really. i mean, there was some, there was a lot of sparism, but, in fact, they had no choice because anybody who tried to run away or surrender was shot. stalin ran lenongrad, and his officer was the one in the siege who deployed troops behind the front line to shoot down anybody who ran away so that the men in the front line knew, but if they hung in there against the germans, they might get killed, but if they tried to turn around, they would get killed. >> host: the russians killed their own. >> guest: 300,000, that's