called the songdo international business district.t'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's just the very beginning of the city. it's not anywhere close to complete. >> south korea is an economic powerhouse in the region. songdo city is being built from the ground up -- on a six square kilometer patch of land reclaimed from the yellow sea. the city will cost around 40 billion us dollars, and it's expected to be completed by 2020. living and office space for 250,000 people is under construction -- along with ultra-modern infrastr