If World War 3 broke out between the world's most powerful nations, where would you run to hide? And why?

There would not be much point in running and hiding. Even if someone did escape, the world would be in pretty bad shape.

What is someone going to do? Build an underground bunker in the middle of Kansas where they will be surviving?

Plus, given the wishy washy'ness of the governments, WW3 would probably be called off in less than a day.