1/3. The intriguing story of the birth of the skyscraper, the magical "machine that makes the land pay", which became an icon of the 20th century. From the amusement parks and fairs of New York to the ruthless businessmen of Chicago, Alan Yentob reveals how the influences that shaped them are linked by passion, ego, greed and the relentless drive of technology. Producer Roger Parsons ; Exec producer Alan Yentob