here science fiction springs to life. cutting edge technology regulates every aspect of life here.et's take a closer look now at what's aiming to be the most modern city in the world. >> south korea's capital seoul is a booming, rapidly-expanding city with 20 million residents. here, history and tradition mix with modern life -- there's no space here for a comprehensive urban renewal. but just 40 kilometers west of seoul, a new bridge leads to south korea's future: songdo city -- also called the songdo international business district. it's a place its creators call a 21st century "smart city." and it serves as a model for what other new south koran cities could look like, and how they could function. songdo has turned into a teeming laboratory for global experts and pioneers from every industry -- construction, environmental engineering, computer technology and architecture. the city of the 21st ceuntry is still a baby. when i look at the entire songdo development, the project i'm working on is only one fifth. and that part alone is alone one third complete. so you can imagine, it'