Do you have any information about nuclear shelters (big ones). We (Trinity team) are working on shelters right now and we can't find any good materials about it. We're the most interested in technical data (how many people can live in that shelter, how long, size of shelters). We have done with small, private shelters, but now we want to work out the big ones, so if you have some information or you know any good links about shelters, let us know.