Would you travel back in time for the chance to live in Soviet Russia? Probably not. But what if doing so meant you'd be in a movie -- would you do it then? Probably not? The idea sounds ridiculous, but not to director Ilya Khrzhanovsky. For the last six years, the Russian filmmaker has been working on 'Dau,' a movie based on the life of Soviet physicist Lev Landau. To film it, Khrzahnovsky has done the unthinkable: he's set up an exact replicable of a Soviet town inside an enormous brick building, where saying the wrong word can either mean loss of paycheck, or, loss of job.