Bomb shelter

Ze Swiss are extremely security conscious. Even though they haven't been in a war since (from what I can wikipedia) like forever they keep their rules of having to build a bomb shelter into every new house. Like ours. There are four flats in our brand new house. One of the basement storage areas is a bomb shelter fitted with a sanitary toilet (one of those that you do your business in and cannot flush). Of course it is also filled with all sorts of stuff that neighbours couldn't fit into the flat, and apart from there being a small window there really isn't a lot of space in case of "ze bomb" hitting Zürich. What are the odds? Considering that every crook in the world has a bank account in Switzerland?