tornado, tsunami interconnected modules. this thing can withstand a tsunami or tornado. made of concrete and rebar tost water. look at this in the case of a tsunami. what would happen? the wave comes, you get into this thing, the wave actually picks it up, it can float, but it's tethered and it stays in place. it floats above the water. it's a lifeboat basically of sorts. here's computer of the statim after the storm hits. it floats on top of the water. i want to talk to the inventor of the system, live from san juan, puerto rico. this is remarkable, if it were to work. how many people can get inside one of these units? >> it's approximately between 50 to 70 people. >> from 7 to 15 people?