The history of my mother's family -- of the Rosenbaums, in particular, and the Jews of Vienna, in general -- only came to me in fits and starts, if it came at all. As I explained in Part 1 of my discussion of the film, "Auf Wiedersehen: 'Til We Meet Again," my family, like that of filmmaker Linda Mills, kept lots of secrets. I suppose I could have gone off on my own to try