The only prominient Vietnamese immigration story would be right after the fall of Saigon, 1975. I am not sure if that is too modern for our American girl series. I can imagine that the Viet Nam war might be too controversial for American Girl. But then again they did Addy's stories. So I am sure they will do a good job. I personally think the Japanese interniment camp is a story that should be told. It truly questions the concept of an American democracy and freedom. I like the idea of the chinese rail road because it can really conjure up some interesting images.