Video study guide for Episode 7: Cities of America The Story of Us. Movie guide comes complete with answer key. Questions follow the film in order. Episode 7: CitiesBetween 1880 and 1930, nearly 24 million new immigrants arrive in America. Many go to work building a new frontier: the modern city, one of America's greatest inventions. The high cost of land in cities like New York and Chicago means the only way to build is up. A new kind of building, the sky scraper, is made possible by steel.